diff options
Diffstat (limited to 'arch/sh')
32 files changed, 89 insertions, 377 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index b77f512bb176..31a7d12db705 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 config SUPERH def_bool y + select ARCH_HAS_BINFMT_FLAT if !MMU select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_MIGHT_HAVE_PC_PARPORT @@ -14,6 +15,7 @@ config SUPERH select HAVE_ARCH_TRACEHOOK select HAVE_PERF_EVENTS select HAVE_DEBUG_BUGVERBOSE + select HAVE_FAST_GUP if MMU select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) select ARCH_HAS_GCOV_PROFILE_ALL @@ -63,6 +65,7 @@ config SUPERH config SUPERH32 def_bool "$(ARCH)" = "sh" select ARCH_32BIT_OFF_T + select GUP_GET_PTE_LOW_HIGH if X2TLB select HAVE_KPROBES select HAVE_KRETPROBES select HAVE_IOREMAP_PROT if MMU && !X2TLB @@ -623,7 +626,7 @@ config CRASH_DUMP to a memory address not used by the main kernel using PHYSICAL_START. - For more details see Documentation/kdump/kdump.txt + For more details see Documentation/kdump/kdump.rst config KEXEC_JUMP bool "kexec jump (EXPERIMENTAL)" diff --git a/arch/sh/configs/hp6xx_defconfig b/arch/sh/configs/hp6xx_defconfig index 4dcf7f552582..91d43e2bffea 100644 --- a/arch/sh/configs/hp6xx_defconfig +++ b/arch/sh/configs/hp6xx_defconfig @@ -40,7 +40,6 @@ CONFIG_FB=y CONFIG_FIRMWARE_EDID=y CONFIG_FB_HIT=y CONFIG_FB_SH_MOBILE_LCDC=y -CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_FONTS=y CONFIG_FONT_PEARL_8x8=y diff --git a/arch/sh/configs/sdk7786_defconfig b/arch/sh/configs/sdk7786_defconfig index 5209889765ad..49a29338789b 100644 --- a/arch/sh/configs/sdk7786_defconfig +++ b/arch/sh/configs/sdk7786_defconfig @@ -191,7 +191,6 @@ CONFIG_CONFIGFS_FS=y CONFIG_JFFS2_FS=m CONFIG_JFFS2_FS_XATTR=y CONFIG_UBIFS_FS=m -CONFIG_LOGFS=m CONFIG_CRAMFS=m CONFIG_SQUASHFS=m CONFIG_ROMFS_FS=m diff --git a/arch/sh/configs/se7712_defconfig b/arch/sh/configs/se7712_defconfig index 5a1097641247..1e116529735f 100644 --- a/arch/sh/configs/se7712_defconfig +++ b/arch/sh/configs/se7712_defconfig @@ -63,7 +63,6 @@ CONFIG_NET_SCH_NETEM=y CONFIG_NET_CLS_TCINDEX=y CONFIG_NET_CLS_ROUTE4=y CONFIG_NET_CLS_FW=y -CONFIG_NET_CLS_IND=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_MTD=y CONFIG_MTD_BLOCK=y diff --git a/arch/sh/configs/se7721_defconfig b/arch/sh/configs/se7721_defconfig index 9c0ef13bee10..c66e512719ab 100644 --- a/arch/sh/configs/se7721_defconfig +++ b/arch/sh/configs/se7721_defconfig @@ -62,7 +62,6 @@ CONFIG_NET_SCH_NETEM=y CONFIG_NET_CLS_TCINDEX=y CONFIG_NET_CLS_ROUTE4=y CONFIG_NET_CLS_FW=y -CONFIG_NET_CLS_IND=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_MTD=y CONFIG_MTD_BLOCK=y diff --git a/arch/sh/configs/sh2007_defconfig b/arch/sh/configs/sh2007_defconfig index a1cf6447dbb1..cbd6742eb423 100644 --- a/arch/sh/configs/sh2007_defconfig +++ b/arch/sh/configs/sh2007_defconfig @@ -85,7 +85,6 @@ CONFIG_WATCHDOG=y CONFIG_SH_WDT=y CONFIG_SSB=y CONFIG_FB=y -CONFIG_BACKLIGHT_LCD_SUPPORT=y # CONFIG_LCD_CLASS_DEVICE is not set CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y diff --git a/arch/sh/configs/titan_defconfig b/arch/sh/configs/titan_defconfig index 822fa9e96f74..171ab05ce4fc 100644 --- a/arch/sh/configs/titan_defconfig +++ b/arch/sh/configs/titan_defconfig @@ -142,7 +142,6 @@ CONFIG_GACT_PROB=y CONFIG_NET_ACT_MIRRED=m CONFIG_NET_ACT_IPT=m CONFIG_NET_ACT_PEDIT=m -CONFIG_NET_CLS_IND=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_FW_LOADER=m CONFIG_CONNECTOR=m diff --git a/arch/sh/include/asm/flat.h b/arch/sh/include/asm/flat.h index 843d458b8329..fee4f25555cb 100644 --- a/arch/sh/include/asm/flat.h +++ b/arch/sh/include/asm/flat.h @@ -11,11 +11,8 @@ #include <asm/unaligned.h> -#define flat_argvp_envp_on_stack() 0 -#define flat_old_ram_flag(flags) (flags) -#define flat_reloc_valid(reloc, size) ((reloc) <= (size)) static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags, - u32 *addr, u32 *persistent) + u32 *addr) { *addr = get_unaligned((__force u32 *)rp); return 0; @@ -25,8 +22,6 @@ static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel) put_unaligned(addr, (__force u32 *)rp); return 0; } -#define flat_get_relocate_addr(rel) (rel) -#define flat_set_persistent(relval, p) ({ (void)p; 0; }) #define FLAT_PLAT_INIT(_r) \ do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \ diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h index c28e37a344ad..ac0561960c52 100644 --- a/arch/sh/include/asm/io.h +++ b/arch/sh/include/asm/io.h @@ -369,7 +369,11 @@ static inline int iounmap_fixed(void __iomem *addr) { return -EINVAL; } #define ioremap_nocache ioremap #define ioremap_uc ioremap -#define iounmap __iounmap + +static inline void iounmap(void __iomem *addr) +{ + __iounmap(addr); +} /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem diff --git a/arch/sh/include/asm/pgtable-3level.h b/arch/sh/include/asm/pgtable-3level.h index 7d8587eb65ff..779260b721ca 100644 --- a/arch/sh/include/asm/pgtable-3level.h +++ b/arch/sh/include/asm/pgtable-3level.h @@ -38,6 +38,9 @@ static inline unsigned long pud_page_vaddr(pud_t pud) return pud_val(pud); } +/* only used by the stubbed out hugetlb gup code, should never be called */ +#define pud_page(pud) NULL + #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) { diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h index 3587103afe59..9085d1142fa3 100644 --- a/arch/sh/include/asm/pgtable.h +++ b/arch/sh/include/asm/pgtable.h @@ -149,6 +149,43 @@ extern void paging_init(void); extern void page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd); +static inline bool __pte_access_permitted(pte_t pte, u64 prot) +{ + return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot; +} + +#ifdef CONFIG_X2TLB +static inline bool pte_access_permitted(pte_t pte, bool write) +{ + u64 prot = _PAGE_PRESENT; + + prot |= _PAGE_EXT(_PAGE_EXT_KERN_READ | _PAGE_EXT_USER_READ); + if (write) + prot |= _PAGE_EXT(_PAGE_EXT_KERN_WRITE | _PAGE_EXT_USER_WRITE); + return __pte_access_permitted(pte, prot); +} +#elif defined(CONFIG_SUPERH64) +static inline bool pte_access_permitted(pte_t pte, bool write) +{ + u64 prot = _PAGE_PRESENT | _PAGE_USER | _PAGE_READ; + + if (write) + prot |= _PAGE_WRITE; + return __pte_access_permitted(pte, prot); +} +#else +static inline bool pte_access_permitted(pte_t pte, bool write) +{ + u64 prot = _PAGE_PRESENT | _PAGE_USER; + + if (write) + prot |= _PAGE_RW; + return __pte_access_permitted(pte, prot); +} +#endif + +#define pte_access_permitted pte_access_permitted + /* arch/sh/mm/mmap.c */ #define HAVE_ARCH_UNMAPPED_AREA #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN diff --git a/arch/sh/kernel/cpu/sh2a/fpu.c b/arch/sh/kernel/cpu/sh2a/fpu.c index 74b48db86dd7..0bcff11a4843 100644 --- a/arch/sh/kernel/cpu/sh2a/fpu.c +++ b/arch/sh/kernel/cpu/sh2a/fpu.c @@ -568,5 +568,5 @@ BUILD_TRAP_HANDLER(fpu_error) return; } - force_sig(SIGFPE, tsk); + force_sig(SIGFPE); } diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c index 1ff56e5ba990..03ffd8cdf542 100644 --- a/arch/sh/kernel/cpu/sh4/fpu.c +++ b/arch/sh/kernel/cpu/sh4/fpu.c @@ -421,5 +421,5 @@ BUILD_TRAP_HANDLER(fpu_error) } } - force_sig(SIGFPE, tsk); + force_sig(SIGFPE); } diff --git a/arch/sh/kernel/cpu/sh5/fpu.c b/arch/sh/kernel/cpu/sh5/fpu.c index 9218d9ed787e..3966b5ee8e93 100644 --- a/arch/sh/kernel/cpu/sh5/fpu.c +++ b/arch/sh/kernel/cpu/sh5/fpu.c @@ -100,9 +100,7 @@ void restore_fpu(struct task_struct *tsk) asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs) { - struct task_struct *tsk = current; - regs->pc += 4; - force_sig(SIGFPE, tsk); + force_sig(SIGFPE); } diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c index bc96b16288c1..3bd010b4c55f 100644 --- a/arch/sh/kernel/hw_breakpoint.c +++ b/arch/sh/kernel/hw_breakpoint.c @@ -338,7 +338,7 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args) /* Deliver the signal to userspace */ if (!arch_check_bp_in_kernelspace(&bp->hw.info)) { force_sig_fault(SIGTRAP, TRAP_HWBKPT, - (void __user *)NULL, current); + (void __user *)NULL); } rcu_read_unlock(); diff --git a/arch/sh/kernel/kdebugfs.c b/arch/sh/kernel/kdebugfs.c index 95428e05d212..8b505e1556a5 100644 --- a/arch/sh/kernel/kdebugfs.c +++ b/arch/sh/kernel/kdebugfs.c @@ -9,9 +9,6 @@ EXPORT_SYMBOL(arch_debugfs_dir); static int __init arch_kdebugfs_init(void) { arch_debugfs_dir = debugfs_create_dir("sh", NULL); - if (!arch_debugfs_dir) - return -ENOMEM; - return 0; } arch_initcall(arch_kdebugfs_init); diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c index 3390349ff976..11085e48eaa6 100644 --- a/arch/sh/kernel/ptrace_64.c +++ b/arch/sh/kernel/ptrace_64.c @@ -550,7 +550,7 @@ asmlinkage void do_single_step(unsigned long long vec, struct pt_regs *regs) continually stepping. */ local_irq_enable(); regs->sr &= ~SR_SSTEP; - force_sig(SIGTRAP, current); + force_sig(SIGTRAP); } /* Called with interrupts disabled */ @@ -561,7 +561,7 @@ BUILD_TRAP_HANDLER(breakpoint) /* We need to forward step the PC, to counteract the backstep done in signal.c. */ local_irq_enable(); - force_sig(SIGTRAP, current); + force_sig(SIGTRAP); regs->pc += 4; } diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index 2a2121ba8ebe..24473fa6c3b6 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -176,7 +176,7 @@ asmlinkage int sys_sigreturn(void) return r0; badframe: - force_sig(SIGSEGV, current); + force_sig(SIGSEGV); return 0; } @@ -207,7 +207,7 @@ asmlinkage int sys_rt_sigreturn(void) return r0; badframe: - force_sig(SIGSEGV, current); + force_sig(SIGSEGV); return 0; } diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c index f1f1598879c2..b9aaa9266b34 100644 --- a/arch/sh/kernel/signal_64.c +++ b/arch/sh/kernel/signal_64.c @@ -277,7 +277,7 @@ asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3, return (int) ret; badframe: - force_sig(SIGSEGV, current); + force_sig(SIGSEGV); return 0; } @@ -311,7 +311,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3, return (int) ret; badframe: - force_sig(SIGSEGV, current); + force_sig(SIGSEGV); return 0; } diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 016a727d4357..834c9c7d79fa 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c index 8b49cced663d..63cf17bc760d 100644 --- a/arch/sh/kernel/traps.c +++ b/arch/sh/kernel/traps.c @@ -141,7 +141,7 @@ BUILD_TRAP_HANDLER(debug) SIGTRAP) == NOTIFY_STOP) return; - force_sig(SIGTRAP, current); + force_sig(SIGTRAP); } /* @@ -167,7 +167,7 @@ BUILD_TRAP_HANDLER(bug) } #endif - force_sig(SIGTRAP, current); + force_sig(SIGTRAP); } BUILD_TRAP_HANDLER(nmi) diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c index f2a18b5fafd8..058c6181bb30 100644 --- a/arch/sh/kernel/traps_32.c +++ b/arch/sh/kernel/traps_32.c @@ -533,7 +533,7 @@ uspace_segv: "access (PC %lx PR %lx)\n", current->comm, regs->pc, regs->pr); - force_sig_fault(SIGBUS, si_code, (void __user *)address, current); + force_sig_fault(SIGBUS, si_code, (void __user *)address); } else { inc_unaligned_kernel_access(); @@ -603,7 +603,7 @@ asmlinkage void do_divide_error(unsigned long r4) /* Let gcc know unhandled cases don't make it past here */ return; } - force_sig_fault(SIGFPE, code, NULL, current); + force_sig_fault(SIGFPE, code, NULL); } #endif @@ -611,7 +611,6 @@ asmlinkage void do_reserved_inst(void) { struct pt_regs *regs = current_pt_regs(); unsigned long error_code; - struct task_struct *tsk = current; #ifdef CONFIG_SH_FPU_EMU unsigned short inst = 0; @@ -633,7 +632,7 @@ asmlinkage void do_reserved_inst(void) /* Enable DSP mode, and restart instruction. */ regs->sr |= SR_DSP; /* Save DSP mode */ - tsk->thread.dsp_status.status |= SR_DSP; + current->thread.dsp_status.status |= SR_DSP; return; } #endif @@ -641,7 +640,7 @@ asmlinkage void do_reserved_inst(void) error_code = lookup_exception_vector(); local_irq_enable(); - force_sig(SIGILL, tsk); + force_sig(SIGILL); die_if_no_fixup("reserved instruction", regs, error_code); } @@ -697,7 +696,6 @@ asmlinkage void do_illegal_slot_inst(void) { struct pt_regs *regs = current_pt_regs(); unsigned long inst; - struct task_struct *tsk = current; if (kprobe_handle_illslot(regs->pc) == 0) return; @@ -716,7 +714,7 @@ asmlinkage void do_illegal_slot_inst(void) inst = lookup_exception_vector(); local_irq_enable(); - force_sig(SIGILL, tsk); + force_sig(SIGILL); die_if_no_fixup("illegal slot instruction", regs, inst); } diff --git a/arch/sh/kernel/traps_64.c b/arch/sh/kernel/traps_64.c index 8ce90a7da67d..37046f3a26d3 100644 --- a/arch/sh/kernel/traps_64.c +++ b/arch/sh/kernel/traps_64.c @@ -599,7 +599,7 @@ static void do_unhandled_exception(int signr, char *str, unsigned long error, struct pt_regs *regs) { if (user_mode(regs)) - force_sig(signr, current); + force_sig(signr); die_if_no_fixup(str, regs, error); } diff --git a/arch/sh/math-emu/math.c b/arch/sh/math-emu/math.c index a0fa8fc88739..e8be0eca0444 100644 --- a/arch/sh/math-emu/math.c +++ b/arch/sh/math-emu/math.c @@ -560,7 +560,7 @@ static int ieee_fpe_handler(struct pt_regs *regs) task_thread_info(tsk)->status |= TS_USEDFPU; } else { force_sig_fault(SIGFPE, FPE_FLTINV, - (void __user *)regs->pc, tsk); + (void __user *)regs->pc); } regs->pc = nextpc; diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile index fbe5e79751b3..5051b38fd5b6 100644 --- a/arch/sh/mm/Makefile +++ b/arch/sh/mm/Makefile @@ -17,7 +17,7 @@ cacheops-$(CONFIG_CPU_SHX3) += cache-shx3.o obj-y += $(cacheops-y) mmu-y := nommu.o extable_32.o -mmu-$(CONFIG_MMU) := extable_$(BITS).o fault.o gup.o ioremap.o kmap.o \ +mmu-$(CONFIG_MMU) := extable_$(BITS).o fault.o ioremap.o kmap.o \ pgtable.o tlbex_$(BITS).o tlbflush_$(BITS).o obj-y += $(mmu-y) diff --git a/arch/sh/mm/asids-debugfs.c b/arch/sh/mm/asids-debugfs.c index e5539e0f8e3b..4c1ca197e9c5 100644 --- a/arch/sh/mm/asids-debugfs.c +++ b/arch/sh/mm/asids-debugfs.c @@ -63,13 +63,8 @@ static const struct file_operations asids_debugfs_fops = { static int __init asids_debugfs_init(void) { - struct dentry *asids_dentry; - - asids_dentry = debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, - NULL, &asids_debugfs_fops); - if (!asids_dentry) - return -ENOMEM; - - return PTR_ERR_OR_ZERO(asids_dentry); + debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, NULL, + &asids_debugfs_fops); + return 0; } device_initcall(asids_debugfs_init); diff --git a/arch/sh/mm/cache-debugfs.c b/arch/sh/mm/cache-debugfs.c index 4eb9d43578b4..17d780794497 100644 --- a/arch/sh/mm/cache-debugfs.c +++ b/arch/sh/mm/cache-debugfs.c @@ -109,22 +109,10 @@ static const struct file_operations cache_debugfs_fops = { static int __init cache_debugfs_init(void) { - struct dentry *dcache_dentry, *icache_dentry; - - dcache_dentry = debugfs_create_file("dcache", S_IRUSR, arch_debugfs_dir, - (unsigned int *)CACHE_TYPE_DCACHE, - &cache_debugfs_fops); - if (!dcache_dentry) - return -ENOMEM; - - icache_dentry = debugfs_create_file("icache", S_IRUSR, arch_debugfs_dir, - (unsigned int *)CACHE_TYPE_ICACHE, - &cache_debugfs_fops); - if (!icache_dentry) { - debugfs_remove(dcache_dentry); - return -ENOMEM; - } - + debugfs_create_file("dcache", S_IRUSR, arch_debugfs_dir, + (void *)CACHE_TYPE_DCACHE, &cache_debugfs_fops); + debugfs_create_file("icache", S_IRUSR, arch_debugfs_dir, + (void *)CACHE_TYPE_ICACHE, &cache_debugfs_fops); return 0; } module_init(cache_debugfs_init); diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c index 6defd2c6d9b1..3093bc372138 100644 --- a/arch/sh/mm/fault.c +++ b/arch/sh/mm/fault.c @@ -39,10 +39,9 @@ static inline int notify_page_fault(struct pt_regs *regs, int trap) } static void -force_sig_info_fault(int si_signo, int si_code, unsigned long address, - struct task_struct *tsk) +force_sig_info_fault(int si_signo, int si_code, unsigned long address) { - force_sig_fault(si_signo, si_code, (void __user *)address, tsk); + force_sig_fault(si_signo, si_code, (void __user *)address); } /* @@ -244,8 +243,6 @@ static void __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, unsigned long address, int si_code) { - struct task_struct *tsk = current; - /* User mode accesses just cause a SIGSEGV */ if (user_mode(regs)) { /* @@ -253,7 +250,7 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, */ local_irq_enable(); - force_sig_info_fault(SIGSEGV, si_code, address, tsk); + force_sig_info_fault(SIGSEGV, si_code, address); return; } @@ -308,7 +305,7 @@ do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address) if (!user_mode(regs)) no_context(regs, error_code, address); - force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk); + force_sig_info_fault(SIGBUS, BUS_ADRERR, address); } static noinline int diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c deleted file mode 100644 index 277c882f7489..000000000000 --- a/arch/sh/mm/gup.c +++ /dev/null @@ -1,277 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Lockless get_user_pages_fast for SuperH - * - * Copyright (C) 2009 - 2010 Paul Mundt - * - * Cloned from the x86 and PowerPC versions, by: - * - * Copyright (C) 2008 Nick Piggin - * Copyright (C) 2008 Novell Inc. - */ -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/vmstat.h> -#include <linux/highmem.h> -#include <asm/pgtable.h> - -static inline pte_t gup_get_pte(pte_t *ptep) -{ -#ifndef CONFIG_X2TLB - return READ_ONCE(*ptep); -#else - /* - * With get_user_pages_fast, we walk down the pagetables without - * taking any locks. For this we would like to load the pointers - * atomically, but that is not possible with 64-bit PTEs. What - * we do have is the guarantee that a pte will only either go - * from not present to present, or present to not present or both - * -- it will not switch to a completely different present page - * without a TLB flush in between; something that we are blocking - * by holding interrupts off. - * - * Setting ptes from not present to present goes: - * ptep->pte_high = h; - * smp_wmb(); - * ptep->pte_low = l; - * - * And present to not present goes: - * ptep->pte_low = 0; - * smp_wmb(); - * ptep->pte_high = 0; - * - * We must ensure here that the load of pte_low sees l iff pte_high - * sees h. We load pte_high *after* loading pte_low, which ensures we - * don't see an older value of pte_high. *Then* we recheck pte_low, - * which ensures that we haven't picked up a changed pte high. We might - * have got rubbish values from pte_low and pte_high, but we are - * guaranteed that pte_low will not have the present bit set *unless* - * it is 'l'. And get_user_pages_fast only operates on present ptes, so - * we're safe. - * - * gup_get_pte should not be used or copied outside gup.c without being - * very careful -- it does not atomically load the pte or anything that - * is likely to be useful for you. - */ - pte_t pte; - -retry: - pte.pte_low = ptep->pte_low; - smp_rmb(); - pte.pte_high = ptep->pte_high; - smp_rmb(); - if (unlikely(pte.pte_low != ptep->pte_low)) - goto retry; - - return pte; -#endif -} - -/* - * The performance critical leaf functions are made noinline otherwise gcc - * inlines everything into a single function which results in too much - * register pressure. - */ -static noinline int gup_pte_range(pmd_t pmd, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - u64 mask, result; - pte_t *ptep; - -#ifdef CONFIG_X2TLB - result = _PAGE_PRESENT | _PAGE_EXT(_PAGE_EXT_KERN_READ | _PAGE_EXT_USER_READ); - if (write) - result |= _PAGE_EXT(_PAGE_EXT_KERN_WRITE | _PAGE_EXT_USER_WRITE); -#elif defined(CONFIG_SUPERH64) - result = _PAGE_PRESENT | _PAGE_USER | _PAGE_READ; - if (write) - result |= _PAGE_WRITE; -#else - result = _PAGE_PRESENT | _PAGE_USER; - if (write) - result |= _PAGE_RW; -#endif - - mask = result | _PAGE_SPECIAL; - - ptep = pte_offset_map(&pmd, addr); - do { - pte_t pte = gup_get_pte(ptep); - struct page *page; - - if ((pte_val(pte) & mask) != result) { - pte_unmap(ptep); - return 0; - } - VM_BUG_ON(!pfn_valid(pte_pfn(pte))); - page = pte_page(pte); - get_page(page); - __flush_anon_page(page, addr); - flush_dcache_page(page); - pages[*nr] = page; - (*nr)++; - - } while (ptep++, addr += PAGE_SIZE, addr != end); - pte_unmap(ptep - 1); - - return 1; -} - -static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) -{ - unsigned long next; - pmd_t *pmdp; - - pmdp = pmd_offset(&pud, addr); - do { - pmd_t pmd = *pmdp; - - next = pmd_addr_end(addr, end); - if (pmd_none(pmd)) - return 0; - if (!gup_pte_range(pmd, addr, next, write, pages, nr)) - return 0; - } while (pmdp++, addr = next, addr != end); - - return 1; -} - -static int gup_pud_range(pgd_t pgd, unsigned long addr, unsigned long end, - int write, struct page **pages, int *nr) -{ - unsigned long next; - pud_t *pudp; - - pudp = pud_offset(&pgd, addr); - do { - pud_t pud = *pudp; - - next = pud_addr_end(addr, end); - if (pud_none(pud)) - return 0; - if (!gup_pmd_range(pud, addr, next, write, pages, nr)) - return 0; - } while (pudp++, addr = next, addr != end); - - return 1; -} - -/* - * Like get_user_pages_fast() except its IRQ-safe in that it won't fall - * back to the regular GUP. - * Note a difference with get_user_pages_fast: this always returns the - * number of pages pinned, 0 if no pages were pinned. - */ -int __get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) -{ - struct mm_struct *mm = current->mm; - unsigned long addr, len, end; - unsigned long next; - unsigned long flags; - pgd_t *pgdp; - int nr = 0; - - start &= PAGE_MASK; - addr = start; - len = (unsigned long) nr_pages << PAGE_SHIFT; - end = start + len; - if (unlikely(!access_ok((void __user *)start, len))) - return 0; - - /* - * This doesn't prevent pagetable teardown, but does prevent - * the pagetables and pages from being freed. - */ - local_irq_save(flags); - pgdp = pgd_offset(mm, addr); - do { - pgd_t pgd = *pgdp; - - next = pgd_addr_end(addr, end); - if (pgd_none(pgd)) - break; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) - break; - } while (pgdp++, addr = next, addr != end); - local_irq_restore(flags); - - return nr; -} - -/** - * get_user_pages_fast() - pin user pages in memory - * @start: starting user address - * @nr_pages: number of pages from start to pin - * @gup_flags: flags modifying pin behaviour - * @pages: array that receives pointers to the pages pinned. - * Should be at least nr_pages long. - * - * Attempt to pin user pages in memory without taking mm->mmap_sem. - * If not successful, it will fall back to taking the lock and - * calling get_user_pages(). - * - * Returns number of pages pinned. This may be fewer than the number - * requested. If nr_pages is 0 or negative, returns 0. If no pages - * were pinned, returns -errno. - */ -int get_user_pages_fast(unsigned long start, int nr_pages, - unsigned int gup_flags, struct page **pages) -{ - struct mm_struct *mm = current->mm; - unsigned long addr, len, end; - unsigned long next; - pgd_t *pgdp; - int nr = 0; - - start &= PAGE_MASK; - addr = start; - len = (unsigned long) nr_pages << PAGE_SHIFT; - - end = start + len; - if (end < start) - goto slow_irqon; - - local_irq_disable(); - pgdp = pgd_offset(mm, addr); - do { - pgd_t pgd = *pgdp; - - next = pgd_addr_end(addr, end); - if (pgd_none(pgd)) - goto slow; - if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, - pages, &nr)) - goto slow; - } while (pgdp++, addr = next, addr != end); - local_irq_enable(); - - VM_BUG_ON(nr != (end - start) >> PAGE_SHIFT); - return nr; - - { - int ret; - -slow: - local_irq_enable(); -slow_irqon: - /* Try to get the remaining pages with get_user_pages */ - start += nr << PAGE_SHIFT; - pages += nr; - - ret = get_user_pages_unlocked(start, - (end - start) >> PAGE_SHIFT, pages, - gup_flags); - - /* Have to be a bit careful with return values */ - if (nr > 0) { - if (ret < 0) - ret = nr; - else - ret += nr; - } - - return ret; - } -} diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index a53a040d0054..b59bad86b31e 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -861,13 +861,8 @@ static const struct file_operations pmb_debugfs_fops = { static int __init pmb_debugfs_init(void) { - struct dentry *dentry; - - dentry = debugfs_create_file("pmb", S_IFREG | S_IRUGO, - arch_debugfs_dir, NULL, &pmb_debugfs_fops); - if (!dentry) - return -ENOMEM; - + debugfs_create_file("pmb", S_IFREG | S_IRUGO, arch_debugfs_dir, NULL, + &pmb_debugfs_fops); return 0; } subsys_initcall(pmb_debugfs_init); diff --git a/arch/sh/mm/tlb-debugfs.c b/arch/sh/mm/tlb-debugfs.c index dea637a09246..11c6148283f3 100644 --- a/arch/sh/mm/tlb-debugfs.c +++ b/arch/sh/mm/tlb-debugfs.c @@ -149,22 +149,10 @@ static const struct file_operations tlb_debugfs_fops = { static int __init tlb_debugfs_init(void) { - struct dentry *itlb, *utlb; - - itlb = debugfs_create_file("itlb", S_IRUSR, arch_debugfs_dir, - (unsigned int *)TLB_TYPE_ITLB, - &tlb_debugfs_fops); - if (unlikely(!itlb)) - return -ENOMEM; - - utlb = debugfs_create_file("utlb", S_IRUSR, arch_debugfs_dir, - (unsigned int *)TLB_TYPE_UTLB, - &tlb_debugfs_fops); - if (unlikely(!utlb)) { - debugfs_remove(itlb); - return -ENOMEM; - } - + debugfs_create_file("itlb", S_IRUSR, arch_debugfs_dir, + (void *)TLB_TYPE_ITLB, &tlb_debugfs_fops); + debugfs_create_file("utlb", S_IRUSR, arch_debugfs_dir, + (void *)TLB_TYPE_UTLB, &tlb_debugfs_fops); return 0; } module_init(tlb_debugfs_init); diff --git a/arch/sh/oprofile/backtrace.c b/arch/sh/oprofile/backtrace.c index 8279a7e91043..f1205f92631d 100644 --- a/arch/sh/oprofile/backtrace.c +++ b/arch/sh/oprofile/backtrace.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * SH specific backtracing code for oprofile * @@ -7,11 +8,6 @@ * * Based on ARM oprofile backtrace code by Richard Purdie and in turn, i386 * oprofile backtrace code by John Levon, David Smith - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * */ #include <linux/oprofile.h> #include <linux/sched.h> |