treewide: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

106 files changed, 236 insertions, 251 deletions

diff --git a/arch/alpha/kernel/module.c b/arch/alpha/kernel/module.c
index ac110ae8f978..5b60c248de9e 100644
--- a/arch/alpha/kernel/module.c
+++ b/arch/alpha/kernel/module.c
@@ -212,7 +212,7 @@ apply_relocate_add(Elf64_Shdr *sechdrs, const char *strtab,
 			    STO_ALPHA_STD_GPLOAD)
 				/* Omit the prologue. */
 				value += 8;
-			/* FALLTHRU */
+			fallthrough;
 		case R_ALPHA_BRADDR:
 			value -= (u64)location + 4;
 			if (value & 3)
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index a813020d2f11..15bc9d1e79f4 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -453,7 +453,7 @@ syscall_restart(unsigned long r0, unsigned long r19,
 			regs->r0 = EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->r0 = r0;	/* reset v0 and a3 and replay syscall */
 		regs->r19 = r19;
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index 49754e07e04f..921d4b6e4d95 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -883,7 +883,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
 
 	case 0x26: /* sts */
 		fake_reg = s_reg_to_mem(alpha_read_fp_reg(reg));
-		/* FALLTHRU */
+		fallthrough;
 
 	case 0x2c: /* stl */
 		__asm__ __volatile__(
@@ -911,7 +911,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
 
 	case 0x27: /* stt */
 		fake_reg = alpha_read_fp_reg(reg);
-		/* FALLTHRU */
+		fallthrough;
 
 	case 0x2d: /* stq */
 		__asm__ __volatile__(
diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c
index d04837d91b40..03f8b1be0c3a 100644
--- a/arch/arc/kernel/disasm.c
+++ b/arch/arc/kernel/disasm.c
@@ -339,7 +339,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state,
 
 	case op_LDWX_S:	/* LDWX_S c, [b, u6] */
 		state->x = 1;
-		/* intentional fall-through */
+		fallthrough;
 
 	case op_LDW_S:	/* LDW_S c, [b, u6] */
 		state->zz = 2;
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 3d57ed0d8535..8222f8c54690 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -321,7 +321,7 @@ static void arc_restart_syscall(struct k_sigaction *ka, struct pt_regs *regs)
 			regs->r0 = -EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 
 	case -ERESTARTNOINTR:
 		/*
diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index f87758a6851b..74ad4256022e 100644
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -572,7 +572,7 @@ static unsigned long read_pointer(const u8 **pLoc, const void *end,
 #else
 		BUILD_BUG_ON(sizeof(u32) != sizeof(value));
 #endif
-		/* Fall through */
+		fallthrough;
 	case DW_EH_PE_native:
 		if (end < (const void *)(ptr.pul + 1))
 			return 0;
@@ -827,7 +827,7 @@ static int processCFI(const u8 *start, const u8 *end, unsigned long targetLoc,
 			case DW_CFA_def_cfa:
 				state->cfa.reg = get_uleb128(&ptr.p8, end);
 				unw_debug("cfa_def_cfa: r%lu ", state->cfa.reg);
-				/* fall through */
+				fallthrough;
 			case DW_CFA_def_cfa_offset:
 				state->cfa.offs = get_uleb128(&ptr.p8, end);
 				unw_debug("cfa_def_cfa_offset: 0x%lx ",
@@ -835,7 +835,7 @@ static int processCFI(const u8 *start, const u8 *end, unsigned long targetLoc,
 				break;
 			case DW_CFA_def_cfa_sf:
 				state->cfa.reg = get_uleb128(&ptr.p8, end);
-				/* fall through */
+				fallthrough;
 			case DW_CFA_def_cfa_offset_sf:
 				state->cfa.offs = get_sleb128(&ptr.p8, end)
 				    * state->dataAlign;
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index 7fff88e61252..7a4853b1213a 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -547,7 +547,7 @@ static int arch_build_bp_info(struct perf_event *bp,
 		if ((hw->ctrl.type != ARM_BREAKPOINT_EXECUTE)
 			&& max_watchpoint_len >= 8)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
@@ -612,12 +612,12 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
 		/* Allow halfword watchpoints and breakpoints. */
 		if (hw->ctrl.len == ARM_BREAKPOINT_LEN_2)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	case 3:
 		/* Allow single byte watchpoint. */
 		if (hw->ctrl.len == ARM_BREAKPOINT_LEN_1)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		ret = -EINVAL;
 		goto out;
@@ -884,7 +884,7 @@ static int hw_breakpoint_pending(unsigned long addr, unsigned int fsr,
 		break;
 	case ARM_ENTRY_ASYNC_WATCHPOINT:
 		WARN(1, "Asynchronous watchpoint exception taken. Debugging results may be unreliable\n");
-		/* Fall through */
+		fallthrough;
 	case ARM_ENTRY_SYNC_WATCHPOINT:
 		watchpoint_handler(addr, fsr, regs);
 		break;
@@ -933,7 +933,7 @@ static bool core_has_os_save_restore(void)
 		ARM_DBG_READ(c1, c1, 4, oslsr);
 		if (oslsr & ARM_OSLSR_OSLM0)
 			return true;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index c9dc912b83f0..c1892f733f20 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -596,7 +596,7 @@ static int do_signal(struct pt_regs *regs, int syscall)
 		switch (retval) {
 		case -ERESTART_RESTARTBLOCK:
 			restart -= 2;
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
diff --git a/arch/arm/mach-ep93xx/crunch.c b/arch/arm/mach-ep93xx/crunch.c
index 1c05c5bf7e5c..757032d82f63 100644
--- a/arch/arm/mach-ep93xx/crunch.c
+++ b/arch/arm/mach-ep93xx/crunch.c
@@ -49,7 +49,7 @@ static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
 		 * FALLTHROUGH: Ensure we don't try to overwrite our newly
 		 * initialised state information on the first fault.
 		 */
-		/* Fall through */
+		fallthrough;
 
 	case THREAD_NOTIFY_EXIT:
 		crunch_task_release(thread);
diff --git a/arch/arm/mach-mmp/pm-mmp2.c b/arch/arm/mach-mmp/pm-mmp2.c
index 2d86381e152d..7a6f74c32d42 100644
--- a/arch/arm/mach-mmp/pm-mmp2.c
+++ b/arch/arm/mach-mmp/pm-mmp2.c
@@ -123,19 +123,19 @@ void mmp2_pm_enter_lowpower_mode(int state)
 	case POWER_MODE_SYS_SLEEP:
 		apcr |= MPMU_PCR_PJ_SLPEN;		/* set the SLPEN bit */
 		apcr |= MPMU_PCR_PJ_VCTCXOSD;		/* set VCTCXOSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CHIP_SLEEP:
 		apcr |= MPMU_PCR_PJ_SLPEN;
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_SLEEP:
 		apcr |= MPMU_PCR_PJ_APBSD;		/* set APBSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_IDLE:
 		apcr |= MPMU_PCR_PJ_AXISD;		/* set AXISDD bit */
 		apcr |= MPMU_PCR_PJ_DDRCORSD;		/* set DDRCORSD bit */
 		idle_cfg |= APMU_PJ_IDLE_CFG_PJ_PWRDWN;	/* PJ power down */
 		apcr |= MPMU_PCR_PJ_SPSD;
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CORE_EXTIDLE:
 		idle_cfg |= APMU_PJ_IDLE_CFG_PJ_IDLE;	/* set the IDLE bit */
 		idle_cfg &= ~APMU_PJ_IDLE_CFG_ISO_MODE_CNTRL_MASK;
diff --git a/arch/arm/mach-mmp/pm-pxa910.c b/arch/arm/mach-mmp/pm-pxa910.c
index 69ebe18ff209..1d71d73c1862 100644
--- a/arch/arm/mach-mmp/pm-pxa910.c
+++ b/arch/arm/mach-mmp/pm-pxa910.c
@@ -145,23 +145,23 @@ void pxa910_pm_enter_lowpower_mode(int state)
 	case POWER_MODE_UDR:
 		/* only shutdown APB in UDR */
 		apcr |= MPMU_APCR_STBYEN | MPMU_APCR_APBSD;
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_SYS_SLEEP:
 		apcr |= MPMU_APCR_SLPEN;		/* set the SLPEN bit */
 		apcr |= MPMU_APCR_VCTCXOSD;		/* set VCTCXOSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_SLEEP:
 		apcr |= MPMU_APCR_DDRCORSD;		/* set DDRCORSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_IDLE:
 		apcr |= MPMU_APCR_AXISD;		/* set AXISDD bit */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CORE_EXTIDLE:
 		idle_cfg |= APMU_MOH_IDLE_CFG_MOH_IDLE;
 		idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN;
 		idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWR_SW(3)
 			| APMU_MOH_IDLE_CFG_MOH_L2_PWR_SW(3);
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CORE_INTIDLE:
 		break;
 	}
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 1d119b974f5f..59755b5a1ad7 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -396,7 +396,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "3.1";
 			break;
 		case 7:
-		/* FALLTHROUGH */
 		default:
 			/* Use the latest known revision as default */
 			omap_revision = OMAP3430_REV_ES3_1_2;
@@ -416,7 +415,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "1.0";
 			break;
 		case 1:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = AM35XX_REV_ES1_1;
 			cpu_rev = "1.1";
@@ -435,7 +433,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "1.1";
 			break;
 		case 2:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = OMAP3630_REV_ES1_2;
 			cpu_rev = "1.2";
@@ -456,7 +453,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "2.0";
 			break;
 		case 3:
-			/* FALLTHROUGH */
 		default:
 			omap_revision = TI8168_REV_ES2_1;
 			cpu_rev = "2.1";
@@ -473,7 +469,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "2.0";
 			break;
 		case 2:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = AM335X_REV_ES2_1;
 			cpu_rev = "2.1";
@@ -491,7 +486,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "1.1";
 			break;
 		case 2:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = AM437X_REV_ES1_2;
 			cpu_rev = "1.2";
@@ -502,7 +496,6 @@ void __init omap3xxx_check_revision(void)
 	case 0xb968:
 		switch (rev) {
 		case 0:
-		/* FALLTHROUGH */
 		case 1:
 			omap_revision = TI8148_REV_ES1_0;
 			cpu_rev = "1.0";
@@ -512,7 +505,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "2.0";
 			break;
 		case 3:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = TI8148_REV_ES2_1;
 			cpu_rev = "2.1";
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index 6b4548f3b57f..fc7bb2ca1672 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -240,7 +240,7 @@ static int _omap_device_notifier_call(struct notifier_block *nb,
 		if (pdev->dev.of_node)
 			omap_device_build_from_dt(pdev);
 		omap_auxdata_legacy_init(dev);
-		/* fall through */
+		fallthrough;
 	default:
 		od = to_omap_device(pdev);
 		if (od)
diff --git a/arch/arm/mach-orion5x/dns323-setup.c b/arch/arm/mach-orion5x/dns323-setup.c
index d13344b2ddcd..87cb47220e82 100644
--- a/arch/arm/mach-orion5x/dns323-setup.c
+++ b/arch/arm/mach-orion5x/dns323-setup.c
@@ -624,7 +624,7 @@ static void __init dns323_init(void)
 		 dns323ab_leds[0].active_low = 1;
 		 gpio_request(DNS323_GPIO_LED_POWER1, "Power Led Enable");
 		 gpio_direction_output(DNS323_GPIO_LED_POWER1, 0);
-		/* Fall through */
+		fallthrough;
 	case DNS323_REV_B1:
 		i2c_register_board_info(0, dns323ab_i2c_devices,
 				ARRAY_SIZE(dns323ab_i2c_devices));
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
index ea2c84214bac..d23970bd638d 100644
--- a/arch/arm/mach-rpc/riscpc.c
+++ b/arch/arm/mach-rpc/riscpc.c
@@ -46,7 +46,7 @@ static int __init parse_tag_acorn(const struct tag *tag)
 	switch (tag->u.acorn.vram_pages) {
 	case 512:
 		vram_size += PAGE_SIZE * 256;
-		/* Fall through - ??? */
+		fallthrough;	/* ??? */
 	case 256:
 		vram_size += PAGE_SIZE * 256;
 	default:
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index 76a65df42d10..d5c805adf7a8 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -70,7 +70,7 @@ static void __init tegra_cpu_reset_handler_enable(void)
 	switch (err) {
 	case -ENOSYS:
 		tegra_cpu_reset_handler_set(reset_address);
-		/* fall through */
+		fallthrough;
 	case 0:
 		is_enabled = true;
 		break;
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index f4bfc1cac91a..ea81e89e7740 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -694,7 +694,7 @@ thumb2arm(u16 tinstr)
 			return subset[(L<<1) | ((tinstr & (1<<8)) >> 8)] |
 			    (tinstr & 255);		/* register_list */
 		}
-		/* Else, fall through - for illegal instruction case */
+		fallthrough;	/* for illegal instruction case */
 
 	default:
 		return BAD_INSTR;
@@ -750,7 +750,7 @@ do_alignment_t32_to_handler(u32 *pinstr, struct pt_regs *regs,
 	case 0xe8e0:
 	case 0xe9e0:
 		poffset->un = (tinst2 & 0xff) << 2;
-		/* Fall through */
+		fallthrough;
 
 	case 0xe940:
 	case 0xe9c0:
diff --git a/arch/arm/mm/proc-v7-bugs.c b/arch/arm/mm/proc-v7-bugs.c
index c0fbfca5da8b..114c05ab4dd9 100644
--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -71,7 +71,7 @@ static void cpu_v7_spectre_init(void)
 		/* Other ARM CPUs require no workaround */
 		if (read_cpuid_implementor() == ARM_CPU_IMP_ARM)
 			break;
-		/* fallthrough */
+		fallthrough;
 		/* Cortex A57/A72 require firmware workaround */
 	case ARM_CPU_PART_CORTEX_A57:
 	case ARM_CPU_PART_CORTEX_A72: {
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index b2e9e822426f..1eb59003bdec 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -309,14 +309,14 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
 		 * not supported by current hardware on OMAP1
 		 * w |= (0x03 << 7);
 		 */
-		/* fall through */
+		fallthrough;
 	case OMAP_DMA_DATA_BURST_16:
 		if (dma_omap2plus()) {
 			burst = 0x3;
 			break;
 		}
 		/* OMAP1 don't support burst 16 */
-		/* fall through */
+		fallthrough;
 	default:
 		BUG();
 	}
@@ -393,7 +393,7 @@ void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
 			break;
 		}
 		/* OMAP1 don't support burst 16 */
-		/* fall through */
+		fallthrough;
 	default:
 		printk(KERN_ERR "Invalid DMA burst mode\n");
 		BUG();
diff --git a/arch/arm/probes/decode.c b/arch/arm/probes/decode.c
index fe81a9c21f2d..c84053a81358 100644
--- a/arch/arm/probes/decode.c
+++ b/arch/arm/probes/decode.c
@@ -307,7 +307,7 @@ static bool __kprobes decode_regs(probes_opcode_t *pinsn, u32 regs, bool modify)
 		case REG_TYPE_NOPCWB:
 			if (!is_writeback(insn))
 				break; /* No writeback, so any register is OK */
-			/* fall through... */
+			fallthrough;
 		case REG_TYPE_NOPC:
 		case REG_TYPE_NOPCX:
 			/* Reject PC (R15) */
diff --git a/arch/arm/probes/kprobes/core.c b/arch/arm/probes/kprobes/core.c
index 90b5bc723c83..feefa2055eba 100644
--- a/arch/arm/probes/kprobes/core.c
+++ b/arch/arm/probes/kprobes/core.c
@@ -280,7 +280,7 @@ void __kprobes kprobe_handler(struct pt_regs *regs)
 				/* A nested probe was hit in FIQ, it is a BUG */
 				pr_warn("Unrecoverable kprobe detected.\n");
 				dump_kprobe(p);
-				/* fall through */
+				fallthrough;
 			default:
 				/* impossible cases */
 				BUG();
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
index 455966401102..a85174d05473 100644
--- a/arch/arm64/kernel/acpi.c
+++ b/arch/arm64/kernel/acpi.c
@@ -322,7 +322,7 @@ void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
 			 */
 			if (memblock_is_map_memory(phys))
 				return (void __iomem *)__phys_to_virt(phys);
-			/* fall through */
+			fallthrough;
 
 		default:
 			if (region->attribute & EFI_MEMORY_WB)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index a389b999482e..6424584be01e 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -686,7 +686,7 @@ static s64 arm64_ftr_safe_value(const struct arm64_ftr_bits *ftrp, s64 new,
 	case FTR_HIGHER_OR_ZERO_SAFE:
 		if (!cur || !new)
 			break;
-		/* Fallthrough */
+		fallthrough;
 	case FTR_HIGHER_SAFE:
 		ret = new > cur ? new : cur;
 		break;
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 393c6fb1f1cb..1886a02c3f50 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -327,7 +327,7 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
 		set_bit(ICACHEF_VPIPT, &__icache_flags);
 		break;
 	default:
-		/* Fallthrough */
+		fallthrough;
 	case ICACHE_POLICY_VIPT:
 		/* Assume aliasing */
 		set_bit(ICACHEF_ALIASING, &__icache_flags);
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index af234a1e08b7..712e97c03e54 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -257,7 +257,7 @@ static int hw_breakpoint_control(struct perf_event *bp,
 		 * level.
 		 */
 		enable_debug_monitors(dbg_el);
-		/* Fall through */
+		fallthrough;
 	case HW_BREAKPOINT_RESTORE:
 		/* Setup the address register. */
 		write_wb_reg(val_reg, i, info->address);
@@ -541,13 +541,13 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
 			if (hw->ctrl.len == ARM_BREAKPOINT_LEN_2)
 				break;
 
-			/* Fallthrough */
+			fallthrough;
 		case 3:
 			/* Allow single byte watchpoint. */
 			if (hw->ctrl.len == ARM_BREAKPOINT_LEN_1)
 				break;
 
-			/* Fallthrough */
+			fallthrough;
 		default:
 			return -EINVAL;
 		}
diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
index 1cd1a4d0ed30..2a1ad95d9b2c 100644
--- a/arch/arm64/kernel/module.c
+++ b/arch/arm64/kernel/module.c
@@ -315,21 +315,21 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 		/* MOVW instruction relocations. */
 		case R_AARCH64_MOVW_UABS_G0_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_MOVW_UABS_G0:
 			ovf = reloc_insn_movw(RELOC_OP_ABS, loc, val, 0,
 					      AARCH64_INSN_IMM_MOVKZ);
 			break;
 		case R_AARCH64_MOVW_UABS_G1_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_MOVW_UABS_G1:
 			ovf = reloc_insn_movw(RELOC_OP_ABS, loc, val, 16,
 					      AARCH64_INSN_IMM_MOVKZ);
 			break;
 		case R_AARCH64_MOVW_UABS_G2_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_MOVW_UABS_G2:
 			ovf = reloc_insn_movw(RELOC_OP_ABS, loc, val, 32,
 					      AARCH64_INSN_IMM_MOVKZ);
@@ -397,7 +397,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 			break;
 		case R_AARCH64_ADR_PREL_PG_HI21_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_ADR_PREL_PG_HI21:
 			ovf = reloc_insn_adrp(me, sechdrs, loc, val);
 			if (ovf && ovf != -ERANGE)
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 03957a1ae6c0..355ee9eed4dd 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -151,7 +151,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
 			break;
 		}
 		pr_crit("CPU%u: may not have shut down cleanly\n", cpu);
-		/* Fall through */
+		fallthrough;
 	case CPU_STUCK_IN_KERNEL:
 		pr_crit("CPU%u: is stuck in kernel\n", cpu);
 		if (status & CPU_STUCK_REASON_52_BIT_VA)
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index fe6c7d79309d..5d690d60ccad 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -128,7 +128,7 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu)
 	switch (ESR_ELx_EC(esr)) {
 	case ESR_ELx_EC_WATCHPT_LOW:
 		run->debug.arch.far = vcpu->arch.fault.far_el2;
-		/* fall through */
+		fallthrough;
 	case ESR_ELx_EC_SOFTSTP_LOW:
 	case ESR_ELx_EC_BREAKPT_LOW:
 	case ESR_ELx_EC_BKPT32:
diff --git a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
index 0297dc63988c..5e28ea6aa097 100644
--- a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
+++ b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
@@ -21,70 +21,70 @@
 #define save_debug(ptr,reg,nr)						\
 	switch (nr) {							\
 	case 15:	ptr[15] = read_debug(reg, 15);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 14:	ptr[14] = read_debug(reg, 14);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 13:	ptr[13] = read_debug(reg, 13);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 12:	ptr[12] = read_debug(reg, 12);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 11:	ptr[11] = read_debug(reg, 11);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 10:	ptr[10] = read_debug(reg, 10);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 9:		ptr[9] = read_debug(reg, 9);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 8:		ptr[8] = read_debug(reg, 8);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 7:		ptr[7] = read_debug(reg, 7);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 6:		ptr[6] = read_debug(reg, 6);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 5:		ptr[5] = read_debug(reg, 5);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 4:		ptr[4] = read_debug(reg, 4);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 3:		ptr[3] = read_debug(reg, 3);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 2:		ptr[2] = read_debug(reg, 2);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 1:		ptr[1] = read_debug(reg, 1);			\
-			/* Fall through */				\
+			fallthrough;					\
 	default:	ptr[0] = read_debug(reg, 0);			\
 	}
 
 #define restore_debug(ptr,reg,nr)					\
 	switch (nr) {							\
 	case 15:	write_debug(ptr[15], reg, 15);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 14:	write_debug(ptr[14], reg, 14);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 13:	write_debug(ptr[13], reg, 13);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 12:	write_debug(ptr[12], reg, 12);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 11:	write_debug(ptr[11], reg, 11);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 10:	write_debug(ptr[10], reg, 10);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 9:		write_debug(ptr[9], reg, 9);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 8:		write_debug(ptr[8], reg, 8);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 7:		write_debug(ptr[7], reg, 7);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 6:		write_debug(ptr[6], reg, 6);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 5:		write_debug(ptr[5], reg, 5);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 4:		write_debug(ptr[4], reg, 4);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 3:		write_debug(ptr[3], reg, 3);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 2:		write_debug(ptr[2], reg, 2);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 1:		write_debug(ptr[1], reg, 1);			\
-			/* Fall through */				\
+			fallthrough;					\
 	default:	write_debug(ptr[0], reg, 0);			\
 	}
 
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c
index 5a0073511efb..452f4cacd674 100644
--- a/arch/arm64/kvm/hyp/vgic-v3-sr.c
+++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c
@@ -340,10 +340,10 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		cpu_if->vgic_ap0r[3] = __vgic_v3_read_ap0rn(3);
 		cpu_if->vgic_ap0r[2] = __vgic_v3_read_ap0rn(2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		cpu_if->vgic_ap0r[1] = __vgic_v3_read_ap0rn(1);
-		/* Fall through */
+		fallthrough;
 	default:
 		cpu_if->vgic_ap0r[0] = __vgic_v3_read_ap0rn(0);
 	}
@@ -352,10 +352,10 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		cpu_if->vgic_ap1r[3] = __vgic_v3_read_ap1rn(3);
 		cpu_if->vgic_ap1r[2] = __vgic_v3_read_ap1rn(2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		cpu_if->vgic_ap1r[1] = __vgic_v3_read_ap1rn(1);
-		/* Fall through */
+		fallthrough;
 	default:
 		cpu_if->vgic_ap1r[0] = __vgic_v3_read_ap1rn(0);
 	}
@@ -373,10 +373,10 @@ void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[3], 3);
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[2], 2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[1], 1);
-		/* Fall through */
+		fallthrough;
 	default:
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[0], 0);
 	}
@@ -385,10 +385,10 @@ void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[3], 3);
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[2], 2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[1], 1);
-		/* Fall through */
+		fallthrough;
 	default:
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[0], 0);
 	}
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index a206655a39a5..9b11c096a042 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -45,7 +45,7 @@ static u32 get_cpu_asid_bits(void)
 	default:
 		pr_warn("CPU%d: Unknown ASID size (%d); assuming 8-bit\n",
 					smp_processor_id(),  fld);
-		/* Fallthrough */
+		fallthrough;
 	case 0:
 		asid = 8;
 		break;
diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c
index e456652facce..d05c78eace1b 100644
--- a/arch/c6x/kernel/signal.c
+++ b/arch/c6x/kernel/signal.c
@@ -220,7 +220,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
 			regs->a4 = -EINTR;
 			break;
 		}
-	/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 do_restart:
 		regs->a4 = regs->orig_a4;
@@ -252,7 +252,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs,
 				break;
 			}
 
-			/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->a4 = regs->orig_a4;
 			regs->pc -= 4;
diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c
index 9452d6570b7e..970895df75ec 100644
--- a/arch/csky/kernel/signal.c
+++ b/arch/csky/kernel/signal.c
@@ -194,7 +194,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->a0 = -EINTR;
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->a0 = regs->orig_a0;
 			regs->pc -= TRAP0_SIZE;
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index 38d335488a54..69e68949787f 100644
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -227,7 +227,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka)
 			regs->er0 = -EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 do_restart:
 		regs->er0 = regs->orig_er0;
diff --git a/arch/hexagon/kernel/module.c b/arch/hexagon/kernel/module.c
index cf99fb79a124..cb3bf19b0640 100644
--- a/arch/hexagon/kernel/module.c
+++ b/arch/hexagon/kernel/module.c
@@ -120,7 +120,7 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
 		}
 		case R_HEXAGON_HI16:
 			value = (value>>16) & 0xffff;
-			/* fallthrough */
+			fallthrough;
 		case R_HEXAGON_LO16:
 			*location &= ~0x00c03fff;
 			*location |= value & 0x3fff;
diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index d48864c48e5a..94cc7ff52dce 100644
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -155,7 +155,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->r00 = -EINTR;
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->r06 = regs->syscall_nr;
 			pt_set_elr(regs, pt_elr(regs) - 4);
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
index bec762a9b418..fec70d662d0c 100644
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -163,7 +163,7 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
 		case DIE_INIT_MONARCH_LEAVE:
 			if (!kdump_freeze_monarch)
 				break;
-			/* fall through */
+			fallthrough;
 		case DIE_INIT_SLAVE_LEAVE:
 		case DIE_INIT_MONARCH_ENTER:
 		case DIE_MCA_RENDZVOUS_LEAVE:
diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c
index 1a42ba885188..00a496cb346f 100644
--- a/arch/ia64/kernel/module.c
+++ b/arch/ia64/kernel/module.c
@@ -654,7 +654,7 @@ do_reloc (struct module *mod, uint8_t r_type, Elf64_Sym *sym, uint64_t addend,
 				}
 			} else if (!is_internal(mod, val))
 				val = get_plt(mod, location, val, &ok);
-			/* FALL THROUGH */
+			fallthrough;
 		      default:
 			val -= bundle(location);
 			break;
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 971f166873aa..0dc3611e7971 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -3472,7 +3472,7 @@ pfm_restart(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
 			break;
 		case PFM_CTX_LOADED: 
 			if (CTX_HAS_SMPL(ctx) && fmt->fmt_restart_active) break;
-			/* fall through */
+			fallthrough;
 		case PFM_CTX_UNLOADED:
 		case PFM_CTX_ZOMBIE:
 			DPRINT(("invalid state=%d\n", state));
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index d07ed65c9c6e..e67b22fc3c60 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -374,7 +374,7 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
 					/* note: scr->pt.r10 is already -1 */
 					break;
 				}
-				/*FALLTHRU*/
+				fallthrough;
 			case ERESTARTNOINTR:
 				ia64_decrement_ip(&scr->pt);
 				restart = 0; /* don't restart twice if handle_signal() fails... */
diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c
index 2d4e65ba5c3e..6c1a8951dfbb 100644
--- a/arch/ia64/kernel/unaligned.c
+++ b/arch/ia64/kernel/unaligned.c
@@ -1431,7 +1431,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 		if (u.insn.x)
 			/* oops, really a semaphore op (cmpxchg, etc) */
 			goto failure;
-		/*FALLTHRU*/
+		fallthrough;
 	      case LDS_IMM_OP:
 	      case LDSA_IMM_OP:
 	      case LDFS_OP:
@@ -1459,7 +1459,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 		if (u.insn.x)
 			/* oops, really a semaphore op (cmpxchg, etc) */
 			goto failure;
-		/*FALLTHRU*/
+		fallthrough;
 	      case LD_IMM_OP:
 	      case LDA_IMM_OP:
 	      case LDBIAS_IMM_OP:
@@ -1475,7 +1475,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 		if (u.insn.x)
 			/* oops, really a semaphore op (cmpxchg, etc) */
 			goto failure;
-		/*FALLTHRU*/
+		fallthrough;
 	      case ST_IMM_OP:
 	      case STREL_IMM_OP:
 		ret = emulate_store_int(ifa, u.insn, regs);
diff --git a/arch/ia64/kernel/unwind.c b/arch/ia64/kernel/unwind.c
index 7601fe0622d2..6bd64c35e691 100644
--- a/arch/ia64/kernel/unwind.c
+++ b/arch/ia64/kernel/unwind.c
@@ -324,7 +324,7 @@ unw_access_gr (struct unw_frame_info *info, int regnum, unsigned long *val, char
 							return 0;
 						}
 					}
-					/* fall through */
+					fallthrough;
 				      case UNW_NAT_NONE:
 					dummy_nat = 0;
 					nat_addr = &dummy_nat;
diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c
index 37091898adb3..5e0e682f9c61 100644
--- a/arch/m68k/atari/atakeyb.c
+++ b/arch/m68k/atari/atakeyb.c
@@ -207,7 +207,7 @@ repeat:
 					self_test_last_rcv = jiffies;
 					break;
 				}
-				/* FALL THROUGH */
+				fallthrough;
 
 			default:
 				break_flag = scancode & BREAK_MASK;
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index fc034fd19798..a98fca977073 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -1067,7 +1067,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
 			regs->d0 = -EINTR;
 			break;
 		}
-	/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 	do_restart:
 		regs->d0 = regs->orig_d0;
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index 5c9f3a2d6538..a621fcc1a576 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -1018,7 +1018,7 @@ int __init mac_platform_init(void)
 		 */
 		platform_device_register_simple("mac_scsi", 1,
 			mac_scsi_duo_rsrc, ARRAY_SIZE(mac_scsi_duo_rsrc));
-		/* fall through */
+		fallthrough;
 	case MAC_SCSI_OLD:
 		/* Addresses from Developer Notes for Duo System,
 		 * PowerBook 180 & 160, 140 & 170, Macintosh IIsi
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 1f0fad2a98a0..ac77d73af19a 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -370,7 +370,7 @@ void via_nubus_irq_startup(int irq)
 			/* Allow NuBus slots 9 through F. */
 			via2[vDirA] &= 0x80 | ~(1 << irq_idx);
 		}
-		/* fall through */
+		fallthrough;
 	case MAC_VIA_IICI:
 		via_irq_enable(irq);
 		break;
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 795f483b1050..ef46e77e97a5 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -118,7 +118,7 @@ good_area:
 	pr_debug("do_page_fault: good_area\n");
 	switch (error_code & 3) {
 		default:	/* 3: write, present */
-			/* fall through */
+			fallthrough;
 		case 2:		/* write, not present */
 			if (!(vma->vm_flags & VM_WRITE))
 				goto acc_err;
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 65bf5fd8d473..4a96b59f0bee 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -249,7 +249,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
 			regs->r3 = -EINTR;
 			break;
 	}
-	/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 do_restart:
 		/* offset of 4 bytes to re-execute trap (brki) instruction */
diff --git a/arch/mips/include/asm/unroll.h b/arch/mips/include/asm/unroll.h
index 7dd4a80e05d6..6f4ac854b12d 100644
--- a/arch/mips/include/asm/unroll.h
+++ b/arch/mips/include/asm/unroll.h
@@ -28,38 +28,38 @@
 	BUILD_BUG_ON(!__builtin_constant_p(times));		\
 								\
 	switch (times) {					\
-	case 32: fn(__VA_ARGS__); /* fall through */		\
-	case 31: fn(__VA_ARGS__); /* fall through */		\
-	case 30: fn(__VA_ARGS__); /* fall through */		\
-	case 29: fn(__VA_ARGS__); /* fall through */		\
-	case 28: fn(__VA_ARGS__); /* fall through */		\
-	case 27: fn(__VA_ARGS__); /* fall through */		\
-	case 26: fn(__VA_ARGS__); /* fall through */		\
-	case 25: fn(__VA_ARGS__); /* fall through */		\
-	case 24: fn(__VA_ARGS__); /* fall through */		\
-	case 23: fn(__VA_ARGS__); /* fall through */		\
-	case 22: fn(__VA_ARGS__); /* fall through */		\
-	case 21: fn(__VA_ARGS__); /* fall through */		\
-	case 20: fn(__VA_ARGS__); /* fall through */		\
-	case 19: fn(__VA_ARGS__); /* fall through */		\
-	case 18: fn(__VA_ARGS__); /* fall through */		\
-	case 17: fn(__VA_ARGS__); /* fall through */		\
-	case 16: fn(__VA_ARGS__); /* fall through */		\
-	case 15: fn(__VA_ARGS__); /* fall through */		\
-	case 14: fn(__VA_ARGS__); /* fall through */		\
-	case 13: fn(__VA_ARGS__); /* fall through */		\
-	case 12: fn(__VA_ARGS__); /* fall through */		\
-	case 11: fn(__VA_ARGS__); /* fall through */		\
-	case 10: fn(__VA_ARGS__); /* fall through */		\
-	case 9: fn(__VA_ARGS__); /* fall through */		\
-	case 8: fn(__VA_ARGS__); /* fall through */		\
-	case 7: fn(__VA_ARGS__); /* fall through */		\
-	case 6: fn(__VA_ARGS__); /* fall through */		\
-	case 5: fn(__VA_ARGS__); /* fall through */		\
-	case 4: fn(__VA_ARGS__); /* fall through */		\
-	case 3: fn(__VA_ARGS__); /* fall through */		\
-	case 2: fn(__VA_ARGS__); /* fall through */		\
-	case 1: fn(__VA_ARGS__); /* fall through */		\
+	case 32: fn(__VA_ARGS__); fallthrough;			\
+	case 31: fn(__VA_ARGS__); fallthrough;			\
+	case 30: fn(__VA_ARGS__); fallthrough;			\
+	case 29: fn(__VA_ARGS__); fallthrough;			\
+	case 28: fn(__VA_ARGS__); fallthrough;			\
+	case 27: fn(__VA_ARGS__); fallthrough;			\
+	case 26: fn(__VA_ARGS__); fallthrough;			\
+	case 25: fn(__VA_ARGS__); fallthrough;			\
+	case 24: fn(__VA_ARGS__); fallthrough;			\
+	case 23: fn(__VA_ARGS__); fallthrough;			\
+	case 22: fn(__VA_ARGS__); fallthrough;			\
+	case 21: fn(__VA_ARGS__); fallthrough;			\
+	case 20: fn(__VA_ARGS__); fallthrough;			\
+	case 19: fn(__VA_ARGS__); fallthrough;			\
+	case 18: fn(__VA_ARGS__); fallthrough;			\
+	case 17: fn(__VA_ARGS__); fallthrough;			\
+	case 16: fn(__VA_ARGS__); fallthrough;			\
+	case 15: fn(__VA_ARGS__); fallthrough;			\
+	case 14: fn(__VA_ARGS__); fallthrough;			\
+	case 13: fn(__VA_ARGS__); fallthrough;			\
+	case 12: fn(__VA_ARGS__); fallthrough;			\
+	case 11: fn(__VA_ARGS__); fallthrough;			\
+	case 10: fn(__VA_ARGS__); fallthrough;			\
+	case 9: fn(__VA_ARGS__); fallthrough;			\
+	case 8: fn(__VA_ARGS__); fallthrough;			\
+	case 7: fn(__VA_ARGS__); fallthrough;			\
+	case 6: fn(__VA_ARGS__); fallthrough;			\
+	case 5: fn(__VA_ARGS__); fallthrough;			\
+	case 4: fn(__VA_ARGS__); fallthrough;			\
+	case 3: fn(__VA_ARGS__); fallthrough;			\
+	case 2: fn(__VA_ARGS__); fallthrough;			\
+	case 1: fn(__VA_ARGS__); fallthrough;			\
 	case 0: break;						\
 								\
 	default:						\
diff --git a/arch/nds32/kernel/fpu.c b/arch/nds32/kernel/fpu.c
index 62bdafbc53f4..9edd7ed7d7bf 100644
--- a/arch/nds32/kernel/fpu.c
+++ b/arch/nds32/kernel/fpu.c
@@ -45,7 +45,7 @@ void save_fpu(struct task_struct *tsk)
 			      :	/* no output */
 			      : "r" (&tsk->thread.fpu)
 			      : "memory");
-		/* fall through */
+		fallthrough;
 	case SP32_DP16_reg:
 		asm volatile ("fsdi $fd15, [%0+0x78]\n\t"
 			      "fsdi $fd14, [%0+0x70]\n\t"
@@ -58,7 +58,7 @@ void save_fpu(struct task_struct *tsk)
 			      :	/* no output */
 			      : "r" (&tsk->thread.fpu)
 			      : "memory");
-		/* fall through */
+		fallthrough;
 	case SP16_DP8_reg:
 		asm volatile ("fsdi $fd7,  [%0+0x38]\n\t"
 			      "fsdi $fd6,  [%0+0x30]\n\t"
@@ -67,7 +67,7 @@ void save_fpu(struct task_struct *tsk)
 			      :	/* no output */
 			      : "r" (&tsk->thread.fpu)
 			      : "memory");
-		/* fall through */
+		fallthrough;
 	case SP8_DP4_reg:
 		asm volatile ("fsdi $fd3,  [%1+0x18]\n\t"
 			      "fsdi $fd2,  [%1+0x10]\n\t"
@@ -108,7 +108,7 @@ void load_fpu(const struct fpu_struct *fpregs)
 			      "fldi $fd16, [%0+0x80]\n\t"
 			      :	/* no output */
 			      : "r" (fpregs));
-		/* fall through */
+		fallthrough;
 	case SP32_DP16_reg:
 		asm volatile ("fldi $fd15, [%0+0x78]\n\t"
 			      "fldi $fd14, [%0+0x70]\n\t"
@@ -120,7 +120,7 @@ void load_fpu(const struct fpu_struct *fpregs)
 			      "fldi $fd8,  [%0+0x40]\n\t"
 			      :	/* no output */
 			      : "r" (fpregs));
-		/* fall through */
+		fallthrough;
 	case SP16_DP8_reg:
 		asm volatile ("fldi $fd7,  [%0+0x38]\n\t"
 			      "fldi $fd6,  [%0+0x30]\n\t"
@@ -128,7 +128,7 @@ void load_fpu(const struct fpu_struct *fpregs)
 			      "fldi $fd4,  [%0+0x20]\n\t"
 			      :	/* no output */
 			      : "r" (fpregs));
-		/* fall through */
+		fallthrough;
 	case SP8_DP4_reg:
 		asm volatile ("fldi $fd3,  [%1+0x18]\n\t"
 			      "fldi $fd2,  [%1+0x10]\n\t"
diff --git a/arch/nds32/kernel/signal.c b/arch/nds32/kernel/signal.c
index 330b19fcd990..36e25a410bb0 100644
--- a/arch/nds32/kernel/signal.c
+++ b/arch/nds32/kernel/signal.c
@@ -316,7 +316,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->uregs[0] = -EINTR;
 				break;
 			}
-			/* Else, fall through */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->uregs[0] = regs->orig_r0;
 			regs->ipc -= 4;
@@ -361,7 +361,7 @@ static void do_signal(struct pt_regs *regs)
 		switch (regs->uregs[0]) {
 		case -ERESTART_RESTARTBLOCK:
 			regs->uregs[15] = __NR_restart_syscall;
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c
index 97804f21a40c..c779364f0cd0 100644
--- a/arch/openrisc/kernel/signal.c
+++ b/arch/openrisc/kernel/signal.c
@@ -244,7 +244,7 @@ int do_signal(struct pt_regs *regs, int syscall)
 		switch (retval) {
 		case -ERESTART_RESTARTBLOCK:
 			restart = -2;
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 5df5d4cd5d4c..3c037fc96038 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -502,7 +502,7 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
 			regs->gr[28] = -EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 		check_syscallno_in_delay_branch(regs);
 		break;
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 43875c289723..a52c7abf2ca4 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -437,7 +437,6 @@ void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long o
 		break;
 
 	default:
-		/* Fall through */
 		break;
 
 	}
@@ -644,12 +643,12 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 
 	case 15:
 		/* Data TLB miss fault/Data page fault */
-		/* Fall through */
+		fallthrough;
 	case 16:
 		/* Non-access instruction TLB miss fault */
 		/* The instruction TLB entry needed for the target address of the FIC
 		   is absent, and hardware can't find it, so we get to cleanup */
-		/* Fall through */
+		fallthrough;
 	case 17:
 		/* Non-access data TLB miss fault/Non-access data page fault */
 		/* FIXME: 
@@ -673,7 +672,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 			handle_unaligned(regs);
 			return;
 		}
-		/* Fall Through */
+		fallthrough;
 	case 26: 
 		/* PCXL: Data memory access rights trap */
 		fault_address = regs->ior;
@@ -683,7 +682,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 	case 19:
 		/* Data memory break trap */
 		regs->gr[0] |= PSW_X; /* So we can single-step over the trap */
-		/* fall thru */
+		fallthrough;
 	case 21:
 		/* Page reference trap */
 		handle_gdb_break(regs, TRAP_HWBKPT);
@@ -730,7 +729,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 			}
 			mmap_read_unlock(current->mm);
 		}
-		/* Fall Through */
+		fallthrough;
 	case 27: 
 		/* Data memory protection ID trap */
 		if (code == 27 && !user_mode(regs) &&
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 4bfe2da9fbe3..716960f5d92e 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -67,7 +67,7 @@ parisc_acctyp(unsigned long code, unsigned int inst)
 	case 0x30000000: /* coproc2 */
 		if (bit22set(inst))
 			return VM_WRITE;
-		/* fall through */
+		fallthrough;
 
 	case 0x0: /* indexed/memory management */
 		if (bit22set(inst)) {
@@ -370,7 +370,7 @@ bad_area:
 			}
 
 			/* probably address is outside of mapped file */
-			/* fall through */
+			fallthrough;
 		case 17:	/* NA data TLB miss / page fault */
 		case 18:	/* Unaligned access - PCXS only */
 			signo = SIGBUS;
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index 16d09b36fe06..78d61f97371e 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -475,7 +475,7 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image,
 		case BPF_JMP | BPF_JSET | BPF_K:
 		case BPF_JMP | BPF_JSET | BPF_X:
 			true_cond = COND_NE;
-			/* Fall through */
+			fallthrough;
 		cond_branch:
 			/* same targets, can avoid doing the test :) */
 			if (filter[i].jt == filter[i].jf) {
diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c
index 17ba190e84a5..e996e08f1061 100644
--- a/arch/riscv/kernel/signal.c
+++ b/arch/riscv/kernel/signal.c
@@ -250,7 +250,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->a0 = -EINTR;
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
                         regs->a0 = regs->orig_a0;
 			regs->epc -= 0x4;
diff --git a/arch/riscv/net/bpf_jit_comp32.c b/arch/riscv/net/bpf_jit_comp32.c
index bc5f2204693f..579575f9cdae 100644
--- a/arch/riscv/net/bpf_jit_comp32.c
+++ b/arch/riscv/net/bpf_jit_comp32.c
@@ -1020,7 +1020,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
 			emit_zext64(dst, ctx);
 			break;
 		}
-		/* Fallthrough. */
+		fallthrough;
 
 	case BPF_ALU | BPF_ADD | BPF_X:
 	case BPF_ALU | BPF_SUB | BPF_X:
@@ -1079,7 +1079,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
 		case 16:
 			emit(rv_slli(lo(rd), lo(rd), 16), ctx);
 			emit(rv_srli(lo(rd), lo(rd), 16), ctx);
-			/* Fallthrough. */
+			fallthrough;
 		case 32:
 			if (!ctx->prog->aux->verifier_zext)
 				emit(rv_addi(hi(rd), RV_REG_ZERO, 0), ctx);
diff --git a/arch/sh/drivers/platform_early.c b/arch/sh/drivers/platform_early.c
index f3dc3f25b3ff..143747c45206 100644
--- a/arch/sh/drivers/platform_early.c
+++ b/arch/sh/drivers/platform_early.c
@@ -246,7 +246,7 @@ static int __init sh_early_platform_driver_probe_id(char *class_str,
 		case EARLY_PLATFORM_ID_ERROR:
 			pr_warn("%s: unable to parse %s parameter\n",
 				class_str, epdrv->pdrv->driver.name);
-			/* fall-through */
+			fallthrough;
 		case EARLY_PLATFORM_ID_UNSET:
 			match = NULL;
 			break;
diff --git a/arch/sh/kernel/disassemble.c b/arch/sh/kernel/disassemble.c
index 08e1af63edd9..34e25a439c81 100644
--- a/arch/sh/kernel/disassemble.c
+++ b/arch/sh/kernel/disassemble.c
@@ -486,7 +486,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 					pr_cont("xd%d", rn & ~1);
 					break;
 				}
-				/* else, fall through */
+				fallthrough;
 			case D_REG_N:
 				pr_cont("dr%d", rn);
 				break;
@@ -495,7 +495,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 					pr_cont("xd%d", rm & ~1);
 					break;
 				}
-				/* else, fall through */
+				fallthrough;
 			case D_REG_M:
 				pr_cont("dr%d", rm);
 				break;
diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
index 0d5f3c9d52f3..e4147efa9ec6 100644
--- a/arch/sh/kernel/kgdb.c
+++ b/arch/sh/kernel/kgdb.c
@@ -266,7 +266,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 		ptr = &remcomInBuffer[1];
 		if (kgdb_hex2long(&ptr, &addr))
 			linux_regs->pc = addr;
-		/* fallthrough */
+		fallthrough;
 	case 'D':
 	case 'k':
 		atomic_set(&kgdb_cpu_doing_single_step, -1);
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index a0fbb8427b39..4fe3f00137bc 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -418,7 +418,7 @@ handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
 		case -ERESTARTSYS:
 			if (!(sa->sa_flags & SA_RESTART))
 				goto no_system_call_restart;
-		/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->regs[0] = save_r0;
 			regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
diff --git a/arch/sparc/kernel/auxio_64.c b/arch/sparc/kernel/auxio_64.c
index 4843f48bfe85..774a82b0c649 100644
--- a/arch/sparc/kernel/auxio_64.c
+++ b/arch/sparc/kernel/auxio_64.c
@@ -87,7 +87,6 @@ void auxio_set_lte(int on)
 		__auxio_sbus_set_lte(on);
 		break;
 	case AUXIO_TYPE_EBUS:
-		/* FALL-THROUGH */
 	default:
 		break;
 	}
diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c
index bfae98ab8638..23f8838dd96e 100644
--- a/arch/sparc/kernel/central.c
+++ b/arch/sparc/kernel/central.c
@@ -55,7 +55,7 @@ static int clock_board_calc_nslots(struct clock_board *p)
 			else
 				return 5;
 		}
-		/* Fallthrough */
+		fallthrough;
 	default:
 		return 4;
 	}
diff --git a/arch/sparc/kernel/kgdb_32.c b/arch/sparc/kernel/kgdb_32.c
index 7580775a14b9..58ad3f7de1fb 100644
--- a/arch/sparc/kernel/kgdb_32.c
+++ b/arch/sparc/kernel/kgdb_32.c
@@ -122,7 +122,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 			linux_regs->pc = addr;
 			linux_regs->npc = addr + 4;
 		}
-		/* fall through */
+		fallthrough;
 
 	case 'D':
 	case 'k':
diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c
index 5d6c2d287e85..177746ae2c81 100644
--- a/arch/sparc/kernel/kgdb_64.c
+++ b/arch/sparc/kernel/kgdb_64.c
@@ -148,7 +148,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 			linux_regs->tpc = addr;
 			linux_regs->tnpc = addr + 4;
 		}
-		/* fall through */
+		fallthrough;
 
 	case 'D':
 	case 'k':
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index c0886b400dad..2a12c86af956 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -359,7 +359,7 @@ int __init pcr_arch_init(void)
 		 * counter overflow interrupt so we can't make use of
 		 * their hardware currently.
 		 */
-		/* fallthrough */
+		fallthrough;
 	default:
 		err = -ENODEV;
 		goto out_unregister;
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index da8902295c8c..3df960c137f7 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -224,7 +224,7 @@ void __init of_console_init(void)
 
 		case PROMDEV_TTYB:
 			skip = 1;
-			/* FALLTHRU */
+			fallthrough;
 
 		case PROMDEV_TTYA:
 			type = "serial";
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index e2c6f0abda00..e9695a06492f 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -646,7 +646,7 @@ static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs
 	case ERESTARTSYS:
 		if (!(sa->sa_flags & SA_RESTART))
 			goto no_system_call_restart;
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->u_regs[UREG_I0] = orig_i0;
 		regs->tpc -= 4;
@@ -686,7 +686,7 @@ void do_signal32(struct pt_regs * regs)
 				regs->tpc -= 4;
 				regs->tnpc -= 4;
 				pt_regs_clear_syscall(regs);
-				/* fall through */
+				fallthrough;
 			case ERESTART_RESTARTBLOCK:
 				regs->u_regs[UREG_G1] = __NR_restart_syscall;
 				regs->tpc -= 4;
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c
index f1f8c8ebe641..d0e0025ee3ba 100644
--- a/arch/sparc/kernel/signal_32.c
+++ b/arch/sparc/kernel/signal_32.c
@@ -440,7 +440,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
 	case ERESTARTSYS:
 		if (!(sa->sa_flags & SA_RESTART))
 			goto no_system_call_restart;
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->u_regs[UREG_I0] = orig_i0;
 		regs->pc -= 4;
@@ -506,7 +506,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 				regs->pc -= 4;
 				regs->npc -= 4;
 				pt_regs_clear_syscall(regs);
-				/* fall through */
+				fallthrough;
 			case ERESTART_RESTARTBLOCK:
 				regs->u_regs[UREG_G1] = __NR_restart_syscall;
 				regs->pc -= 4;
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index 6937339a272c..255264bcb46a 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -461,7 +461,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
 	case ERESTARTSYS:
 		if (!(sa->sa_flags & SA_RESTART))
 			goto no_system_call_restart;
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->u_regs[UREG_I0] = orig_i0;
 		regs->tpc -= 4;
@@ -532,7 +532,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 				regs->tpc -= 4;
 				regs->tnpc -= 4;
 				pt_regs_clear_syscall(regs);
-				/* fall through */
+				fallthrough;
 			case ERESTART_RESTARTBLOCK:
 				regs->u_regs[UREG_G1] = __NR_restart_syscall;
 				regs->tpc -= 4;
diff --git a/arch/sparc/math-emu/math_32.c b/arch/sparc/math-emu/math_32.c
index 72e560ef4a09..d5beec856146 100644
--- a/arch/sparc/math-emu/math_32.c
+++ b/arch/sparc/math-emu/math_32.c
@@ -359,7 +359,7 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 			*pfsr |= (6 << 14);
 			return 0;			/* simulate invalid_fp_register exception */
 		}
-	/* fall through */
+		fallthrough;
 	case 2:
 		if (freg & 1) {				/* doublewords must have bit 5 zeroed */
 			*pfsr |= (6 << 14);
@@ -380,7 +380,7 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 			*pfsr |= (6 << 14);
 			return 0;			/* simulate invalid_fp_register exception */
 		}
-	/* fall through */
+		fallthrough;
 	case 2:
 		if (freg & 1) {				/* doublewords must have bit 5 zeroed */
 			*pfsr |= (6 << 14);
@@ -408,13 +408,13 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 			*pfsr |= (6 << 14);
 			return 0;			/* simulate invalid_fp_register exception */
 		}
-	/* fall through */
+		fallthrough;
 	case 2:
 		if (freg & 1) {				/* doublewords must have bit 5 zeroed */
 			*pfsr |= (6 << 14);
 			return 0;
 		}
-	/* fall through */
+		fallthrough;
 	case 1:
 		rd = (void *)&fregs[freg];
 		break;
diff --git a/arch/sparc/net/bpf_jit_comp_32.c b/arch/sparc/net/bpf_jit_comp_32.c
index c8eabb973b86..b1dbf2fa8c0a 100644
--- a/arch/sparc/net/bpf_jit_comp_32.c
+++ b/arch/sparc/net/bpf_jit_comp_32.c
@@ -491,7 +491,7 @@ void bpf_jit_compile(struct bpf_prog *fp)
 				} else {
 					emit_loadimm(K, r_A);
 				}
-				/* Fallthrough */
+				fallthrough;
 			case BPF_RET | BPF_A:
 				if (seen_or_pass0) {
 					if (i != flen - 1) {
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index 3d57c71c532e..88cd9b5c1b74 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -70,7 +70,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				PT_REGS_SYSCALL_RET(regs) = -EINTR;
 				break;
 			}
-		/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			PT_REGS_RESTART_SYSCALL(regs);
 			PT_REGS_ORIG_SYSCALL(regs) = PT_REGS_SYSCALL_NR(regs);
diff --git a/arch/x86/boot/cmdline.c b/arch/x86/boot/cmdline.c
index 4ff01176c1cc..21d56ae83cdf 100644
--- a/arch/x86/boot/cmdline.c
+++ b/arch/x86/boot/cmdline.c
@@ -54,7 +54,7 @@ int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *b
 			/* else */
 			state = st_wordcmp;
 			opptr = option;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if (c == '=' && !*opptr) {
@@ -129,7 +129,7 @@ int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option)
 			state = st_wordcmp;
 			opptr = option;
 			wstart = pos;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if (!*opptr)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 0048269180d5..dde7cb3724df 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -178,7 +178,7 @@ parse_memmap(char *p, unsigned long long *start, unsigned long long *size,
 			}
 			*size = 0;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		/*
 		 * If w/o offset, only size specified, memmap=nn[KMG] has the
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 50963472ee85..31e6887d24f1 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4682,7 +4682,7 @@ __init int intel_pmu_init(void)
 
 	case INTEL_FAM6_CORE2_MEROM:
 		x86_add_quirk(intel_clovertown_quirk);
-		/* fall through */
+		fallthrough;
 
 	case INTEL_FAM6_CORE2_MEROM_L:
 	case INTEL_FAM6_CORE2_PENRYN:
@@ -5062,7 +5062,7 @@ __init int intel_pmu_init(void)
 
 	case INTEL_FAM6_SKYLAKE_X:
 		pmem = true;
-		/* fall through */
+		fallthrough;
 	case INTEL_FAM6_SKYLAKE_L:
 	case INTEL_FAM6_SKYLAKE:
 	case INTEL_FAM6_KABYLAKE_L:
@@ -5114,7 +5114,7 @@ __init int intel_pmu_init(void)
 	case INTEL_FAM6_ICELAKE_X:
 	case INTEL_FAM6_ICELAKE_D:
 		pmem = true;
-		/* fall through */
+		fallthrough;
 	case INTEL_FAM6_ICELAKE_L:
 	case INTEL_FAM6_ICELAKE:
 	case INTEL_FAM6_TIGERLAKE_L:
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c
index 63f58bdf556c..8961653c5dd2 100644
--- a/arch/x86/events/intel/lbr.c
+++ b/arch/x86/events/intel/lbr.c
@@ -1268,7 +1268,7 @@ static int branch_type(unsigned long from, unsigned long to, int abort)
 			ret = X86_BR_ZERO_CALL;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case 0x9a: /* call far absolute */
 		ret = X86_BR_CALL;
 		break;
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index c3daf0aaa0ee..cdaab30880b9 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -239,7 +239,7 @@ void __init arch_init_ideal_nops(void)
 			return;
 		}
 
-		/* fall through */
+		fallthrough;
 
 	default:
 #ifdef CONFIG_X86_64
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 21325a4a78b9..779a89e31c4c 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -800,7 +800,7 @@ static int irq_polarity(int idx)
 		return IOAPIC_POL_HIGH;
 	case MP_IRQPOL_RESERVED:
 		pr_warn("IOAPIC: Invalid polarity: 2, defaulting to low\n");
-		/* fall through */
+		fallthrough;
 	case MP_IRQPOL_ACTIVE_LOW:
 	default: /* Pointless default required due to do gcc stupidity */
 		return IOAPIC_POL_LOW;
@@ -848,7 +848,7 @@ static int irq_trigger(int idx)
 		return IOAPIC_EDGE;
 	case MP_IRQTRIG_RESERVED:
 		pr_warn("IOAPIC: Invalid trigger mode 2 defaulting to level\n");
-		/* fall through */
+		fallthrough;
 	case MP_IRQTRIG_LEVEL:
 	default: /* Pointless default required due to do gcc stupidity */
 		return IOAPIC_LEVEL;
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index 7bda71def557..99ee61c9ba54 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -149,7 +149,7 @@ void __init default_setup_apic_routing(void)
 				break;
 			}
 			/* P4 and above */
-			/* fall through */
+			fallthrough;
 		case X86_VENDOR_HYGON:
 		case X86_VENDOR_AMD:
 			def_to_bigsmp = 1;
diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index c7503be92f35..57074cf3ad7c 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -248,7 +248,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
 	switch (leaf) {
 	case 1:
 		l1 = &l1i;
-		/* fall through */
+		fallthrough;
 	case 0:
 		if (!l1->val)
 			return;
diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c
index 7843ab3fde09..3a44346f2276 100644
--- a/arch/x86/kernel/cpu/mce/inject.c
+++ b/arch/x86/kernel/cpu/mce/inject.c
@@ -199,7 +199,7 @@ static int raise_local(void)
 			 * calling irq_enter, but the necessary
 			 * machinery isn't exported currently.
 			 */
-			/*FALL THROUGH*/
+			fallthrough;
 		case MCJ_CTX_PROCESS:
 			raise_exception(m, NULL);
 			break;
diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index d8f9230d2034..abe9fe0fb851 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -193,7 +193,7 @@ unsigned long cmci_intel_adjust_timer(unsigned long interval)
 		if (!atomic_sub_return(1, &cmci_storm_on_cpus))
 			pr_notice("CMCI storm subsided: switching to interrupt mode\n");
 
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case CMCI_STORM_SUBSIDED:
 		/*
diff --git a/arch/x86/kernel/cpu/mtrr/cyrix.c b/arch/x86/kernel/cpu/mtrr/cyrix.c
index 72182809b333..ca670919b561 100644
--- a/arch/x86/kernel/cpu/mtrr/cyrix.c
+++ b/arch/x86/kernel/cpu/mtrr/cyrix.c
@@ -98,7 +98,7 @@ cyrix_get_free_region(unsigned long base, unsigned long size, int replace_reg)
 	case 7:
 		if (size < 0x40)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	case 6:
 	case 5:
 	case 4:
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 8cdf29ffd95f..b98ff620ba77 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -349,7 +349,7 @@ static int arch_build_bp_info(struct perf_event *bp,
 			hw->len = X86_BREAKPOINT_LEN_X;
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index 68acd30c6b87..c2f02f308ecf 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -450,7 +450,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 		ptr = &remcomInBuffer[1];
 		if (kgdb_hex2long(&ptr, &addr))
 			linux_regs->ip = addr;
-		/* fall through */
+		fallthrough;
 	case 'D':
 	case 'k':
 		/* clear the trace bit */
@@ -539,7 +539,7 @@ static int __kgdb_notify(struct die_args *args, unsigned long cmd)
 			 * a system call which should be ignored
 			 */
 			return NOTIFY_DONE;
-		/* fall through */
+		fallthrough;
 	default:
 		if (user_mode(regs))
 			return NOTIFY_DONE;
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 411af4aa7b51..baa21090c9be 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -312,7 +312,7 @@ static void __init construct_default_ioirq_mptable(int mpc_default_type)
 		case 2:
 			if (i == 0 || i == 13)
 				continue;	/* IRQ0 & IRQ13 not connected */
-			/* fall through */
+			fallthrough;
 		default:
 			if (i == 2)
 				continue;	/* IRQ2 is never connected */
@@ -356,7 +356,7 @@ static void __init construct_ioapic_table(int mpc_default_type)
 	default:
 		pr_err("???\nUnknown standard configuration %d\n",
 		       mpc_default_type);
-		/* fall through */
+		fallthrough;
 	case 1:
 	case 5:
 		memcpy(bus.bustype, "ISA   ", 6);
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 5679aa3fdcb8..e7537c5440bb 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -204,7 +204,7 @@ static int set_segment_reg(struct task_struct *task,
 	case offsetof(struct user_regs_struct, ss):
 		if (unlikely(value == 0))
 			return -EIO;
-		/* Else, fall through */
+		fallthrough;
 
 	default:
 		*pt_regs_access(task_pt_regs(task), offset) = value;
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 0ec7ced727fe..a515e2d230b7 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -654,7 +654,7 @@ static void native_machine_emergency_restart(void)
 
 		case BOOT_CF9_FORCE:
 			port_cf9_safe = true;
-			/* Fall through */
+			fallthrough;
 
 		case BOOT_CF9_SAFE:
 			if (port_cf9_safe) {
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index d5fa494c2304..be0d7d4152ec 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -726,7 +726,7 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->ax = -EINTR;
 				break;
 			}
-		/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->ax = regs->orig_ax;
 			regs->ip -= 2;
diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c
index 15e5aad8ac2c..3fdaa042823d 100644
--- a/arch/x86/kernel/uprobes.c
+++ b/arch/x86/kernel/uprobes.c
@@ -735,7 +735,7 @@ static int branch_setup_xol_ops(struct arch_uprobe *auprobe, struct insn *insn)
 		 * OPCODE1() of the "short" jmp which checks the same condition.
 		 */
 		opc1 = OPCODE2(insn) - 0x10;
-		/* fall through */
+		fallthrough;
 	default:
 		if (!is_cond_jmp_opcode(opc1))
 			return -ENOSYS;
@@ -892,7 +892,7 @@ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm,
 			fix_ip_or_call = 0;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		riprel_analyze(auprobe, &insn);
 	}
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index d0e2825ae617..5299ef5ff18d 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3016,7 +3016,7 @@ static void string_registers_quirk(struct x86_emulate_ctxt *ctxt)
 	case 0xa4:	/* movsb */
 	case 0xa5:	/* movsd/w */
 		*reg_rmw(ctxt, VCPU_REGS_RSI) &= (u32)-1;
-		/* fall through */
+		fallthrough;
 	case 0xaa:	/* stosb */
 	case 0xab:	/* stosd/w */
 		*reg_rmw(ctxt, VCPU_REGS_RDI) &= (u32)-1;
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 814d3aee5cef..1d330564eed8 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1779,7 +1779,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
 		ret = kvm_hvcall_signal_event(vcpu, fast, ingpa);
 		if (ret != HV_STATUS_INVALID_PORT_ID)
 			break;
-		/* fall through - maybe userspace knows this conn_id. */
+		fallthrough;	/* maybe userspace knows this conn_id */
 	case HVCALL_POST_MESSAGE:
 		/* don't bother userspace if it has no way to handle it */
 		if (unlikely(rep || !vcpu_to_synic(vcpu)->active)) {
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index c47d2acec529..4aa1c2e00e2a 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -285,7 +285,7 @@ int kvm_set_routing_entry(struct kvm *kvm,
 		switch (ue->u.irqchip.irqchip) {
 		case KVM_IRQCHIP_PIC_SLAVE:
 			e->irqchip.pin += PIC_NUM_PINS / 2;
-			/* fall through */
+			fallthrough;
 		case KVM_IRQCHIP_PIC_MASTER:
 			if (ue->u.irqchip.pin >= PIC_NUM_PINS / 2)
 				return -EINVAL;
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 5ccbee7165a2..35cca2e0c802 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1053,7 +1053,7 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
 	switch (delivery_mode) {
 	case APIC_DM_LOWEST:
 		vcpu->arch.apic_arb_prio++;
-		/* fall through */
+		fallthrough;
 	case APIC_DM_FIXED:
 		if (unlikely(trig_mode && !level))
 			break;
@@ -1341,7 +1341,7 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
 		break;
 	case APIC_TASKPRI:
 		report_tpr_access(apic, false);
-		/* fall thru */
+		fallthrough;
 	default:
 		val = kvm_lapic_get_reg(apic, offset);
 		break;
@@ -2027,7 +2027,7 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
 
 	case APIC_LVT0:
 		apic_manage_nmi_watchdog(apic, val);
-		/* fall through */
+		fallthrough;
 	case APIC_LVTTHMR:
 	case APIC_LVTPC:
 	case APIC_LVT1:
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index a5d0207e7189..43fdb0c12a5d 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4422,7 +4422,7 @@ __reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
 			rsvd_bits(maxphyaddr, 51);
 		rsvd_check->rsvd_bits_mask[1][4] =
 			rsvd_check->rsvd_bits_mask[0][4];
-		/* fall through */
+		fallthrough;
 	case PT64_ROOT_4LEVEL:
 		rsvd_check->rsvd_bits_mask[0][3] = exb_bit_rsvd |
 			nonleaf_bit8_rsvd | rsvd_bits(7, 7) |
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 03dd7bac8034..0194336b64a4 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2668,7 +2668,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
 	case MSR_IA32_APICBASE:
 		if (kvm_vcpu_apicv_active(vcpu))
 			avic_update_vapic_bar(to_svm(vcpu), data);
-		/* Fall through */
+		fallthrough;
 	default:
 		return kvm_set_msr_common(vcpu, msr);
 	}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 46ba2e03a892..819c185adf09 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4654,7 +4654,7 @@ static bool rmode_exception(struct kvm_vcpu *vcpu, int vec)
 			vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
 		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
 			return false;
-		/* fall through */
+		fallthrough;
 	case DB_VECTOR:
 		return !(vcpu->guest_debug &
 			(KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP));
@@ -4827,7 +4827,7 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu)
 		}
 		kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM;
 		kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
-		/* fall through */
+		fallthrough;
 	case BP_VECTOR:
 		/*
 		 * Update instruction length as we may reinject #BP from
@@ -5257,7 +5257,7 @@ static int handle_task_switch(struct kvm_vcpu *vcpu)
 				error_code =
 					vmcs_read32(IDT_VECTORING_ERROR_CODE);
 			}
-			/* fall through */
+			fallthrough;
 		case INTR_TYPE_SOFT_EXCEPTION:
 			kvm_clear_exception_queue(vcpu);
 			break;
@@ -5610,7 +5610,7 @@ static int handle_invpcid(struct kvm_vcpu *vcpu)
 		 * keeping track of global entries in shadow page tables.
 		 */
 
-		/* fall-through */
+		fallthrough;
 	case INVPCID_TYPE_ALL_INCL_GLOBAL:
 		kvm_mmu_unload(vcpu);
 		return kvm_skip_emulated_instruction(vcpu);
@@ -6578,7 +6578,7 @@ static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
 		break;
 	case INTR_TYPE_SOFT_EXCEPTION:
 		vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
-		/* fall through */
+		fallthrough;
 	case INTR_TYPE_HARD_EXCEPTION:
 		if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
 			u32 err = vmcs_read32(error_code_field);
@@ -6588,7 +6588,7 @@ static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
 		break;
 	case INTR_TYPE_SOFT_INTR:
 		vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
-		/* fall through */
+		fallthrough;
 	case INTR_TYPE_EXT_INTR:
 		kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR);
 		break;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 33945283fe07..d39d6cf1d473 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1116,14 +1116,12 @@ static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
 			vcpu->arch.eff_db[dr] = val;
 		break;
 	case 4:
-		/* fall through */
 	case 6:
 		if (!kvm_dr6_valid(val))
 			return -1; /* #GP */
 		vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu);
 		break;
 	case 5:
-		/* fall through */
 	default: /* 7 */
 		if (!kvm_dr7_valid(val))
 			return -1; /* #GP */
@@ -1154,12 +1152,10 @@ int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
 		*val = vcpu->arch.db[array_index_nospec(dr, size)];
 		break;
 	case 4:
-		/* fall through */
 	case 6:
 		*val = vcpu->arch.dr6;
 		break;
 	case 5:
-		/* fall through */
 	default: /* 7 */
 		*val = vcpu->arch.dr7;
 		break;
@@ -3051,7 +3047,8 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 
 	case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3:
 	case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1:
-		pr = true; /* fall through */
+		pr = true;
+		fallthrough;
 	case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3:
 	case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1:
 		if (kvm_pmu_is_valid_msr(vcpu, msr))
@@ -4359,7 +4356,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 	case KVM_CAP_HYPERV_SYNIC2:
 		if (cap->args[0])
 			return -EINVAL;
-		/* fall through */
+		fallthrough;
 
 	case KVM_CAP_HYPERV_SYNIC:
 		if (!irqchip_in_kernel(vcpu->kvm))
@@ -8672,7 +8669,7 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
 		vcpu->arch.pv.pv_unhalted = false;
 		vcpu->arch.mp_state =
 			KVM_MP_STATE_RUNNABLE;
-		/* fall through */
+		fallthrough;
 	case KVM_MP_STATE_RUNNABLE:
 		vcpu->arch.apf.halted = false;
 		break;
diff --git a/arch/x86/lib/cmdline.c b/arch/x86/lib/cmdline.c
index 4f1719e22d3c..b6da09339308 100644
--- a/arch/x86/lib/cmdline.c
+++ b/arch/x86/lib/cmdline.c
@@ -58,7 +58,7 @@ __cmdline_find_option_bool(const char *cmdline, int max_cmdline_size,
 			state = st_wordcmp;
 			opptr = option;
 			wstart = pos;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if (!*opptr) {
@@ -89,7 +89,7 @@ __cmdline_find_option_bool(const char *cmdline, int max_cmdline_size,
 				break;
 			}
 			state = st_wordskip;
-			/* fall through */
+			fallthrough;
 
 		case st_wordskip:
 			if (!c)
@@ -151,7 +151,7 @@ __cmdline_find_option(const char *cmdline, int max_cmdline_size,
 
 			state = st_wordcmp;
 			opptr = option;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if ((c == '=') && !*opptr) {
@@ -172,7 +172,7 @@ __cmdline_find_option(const char *cmdline, int max_cmdline_size,
 				break;
 			}
 			state = st_wordskip;
-			/* fall through */
+			fallthrough;
 
 		case st_wordskip:
 			if (myisspace(c))
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index 31600d851fd8..5e69603ff63f 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -179,7 +179,7 @@ static int resolve_default_seg(struct insn *insn, struct pt_regs *regs, int off)
 		if (insn->addr_bytes == 2)
 			return -EINVAL;
 
-		/* fall through */
+		fallthrough;
 
 	case -EDOM:
 	case offsetof(struct pt_regs, bx):
@@ -362,7 +362,6 @@ static short get_segment_selector(struct pt_regs *regs, int seg_reg_idx)
 		case INAT_SEG_REG_GS:
 			return vm86regs->gs;
 		case INAT_SEG_REG_IGNORE:
-			/* fall through */
 		default:
 			return -EINVAL;
 		}
@@ -386,7 +385,6 @@ static short get_segment_selector(struct pt_regs *regs, int seg_reg_idx)
 		 */
 		return get_user_gs(regs);
 	case INAT_SEG_REG_IGNORE:
-		/* fall through */
 	default:
 		return -EINVAL;
 	}
@@ -786,7 +784,7 @@ int insn_get_code_seg_params(struct pt_regs *regs)
 		 */
 		return INSN_CODE_SEG_PARAMS(4, 8);
 	case 3: /* Invalid setting. CS.L=1, CS.D=1 */
-		/* fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/arch/x86/math-emu/errors.c b/arch/x86/math-emu/errors.c
index 73dc66d887f3..ec071cbb0804 100644
--- a/arch/x86/math-emu/errors.c
+++ b/arch/x86/math-emu/errors.c
@@ -186,7 +186,7 @@ void FPU_printall(void)
 		case TAG_Special:
 			/* Update tagi for the printk below */
 			tagi = FPU_Special(r);
-			/* fall through */
+			fallthrough;
 		case TAG_Valid:
 			printk("st(%d)  %c .%04lx %04lx %04lx %04lx e%+-6d ", i,
 			       getsign(r) ? '-' : '+',
diff --git a/arch/x86/math-emu/fpu_trig.c b/arch/x86/math-emu/fpu_trig.c
index 127ea54122d7..4a9887851ad8 100644
--- a/arch/x86/math-emu/fpu_trig.c
+++ b/arch/x86/math-emu/fpu_trig.c
@@ -1352,7 +1352,7 @@ static void fyl2xp1(FPU_REG *st0_ptr, u_char st0_tag)
 		case TW_Denormal:
 			if (denormal_operand() < 0)
 				return;
-			/* fall through */
+			fallthrough;
 		case TAG_Zero:
 		case TAG_Valid:
 			setsign(st0_ptr, getsign(st0_ptr) ^ getsign(st1_ptr));
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 84d85dbd1dad..9e5ccc56f8e0 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -574,7 +574,7 @@ static bool memremap_should_map_decrypted(resource_size_t phys_addr,
 		/* For SEV, these areas are encrypted */
 		if (sev_active())
 			break;
-		/* Fallthrough */
+		fallthrough;
 
 	case E820_TYPE_PRAM:
 		return true;
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 76cee341507b..b3b17d6c50f0 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -448,7 +448,7 @@ static void do_signal(struct pt_regs *regs)
 						regs->areg[2] = -EINTR;
 						break;
 					}
-					/* fallthrough */
+					fallthrough;
 				case -ERESTARTNOINTR:
 					regs->areg[2] = regs->syscall;
 					regs->pc -= 3;