Merge tag 'Wimplicit-fallthrough-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux

Pull Wimplicit-fallthrough updates from Gustavo A. R. Silva:
 "Mark switch cases where we are expecting to fall through.

  This is part of the ongoing efforts to enable -Wimplicit-fallthrough.

  Most of them have been baking in linux-next for a whole development
  cycle. And with Stephen Rothwell's help, we've had linux-next
  nag-emails going out for newly introduced code that triggers
  -Wimplicit-fallthrough to avoid gaining more of these cases while we
  work to remove the ones that are already present.

  We are getting close to completing this work. Currently, there are
  only 32 of 2311 of these cases left to be addressed in linux-next. I'm
  auditing every case; I take a look into the code and analyze it in
  order to determine if I'm dealing with an actual bug or a false
  positive, as explained here:

      https://lore.kernel.org/lkml/c2fad584-1705-a5f2-d63c-824e9b96cf50@embeddedor.com/

  While working on this, I've found and fixed the several missing
  break/return bugs, some of them introduced more than 5 years ago.

  Once this work is finished, we'll be able to universally enable
  "-Wimplicit-fallthrough" to avoid any of these kinds of bugs from
  entering the kernel again"

* tag 'Wimplicit-fallthrough-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: (27 commits)
  memstick: mark expected switch fall-throughs
  drm/nouveau/nvkm: mark expected switch fall-throughs
  NFC: st21nfca: Fix fall-through warnings
  NFC: pn533: mark expected switch fall-throughs
  block: Mark expected switch fall-throughs
  ASN.1: mark expected switch fall-through
  lib/cmdline.c: mark expected switch fall-throughs
  lib: zstd: Mark expected switch fall-throughs
  scsi: sym53c8xx_2: sym_nvram: Mark expected switch fall-through
  scsi: sym53c8xx_2: sym_hipd: mark expected switch fall-throughs
  scsi: ppa: mark expected switch fall-through
  scsi: osst: mark expected switch fall-throughs
  scsi: lpfc: lpfc_scsi: Mark expected switch fall-throughs
  scsi: lpfc: lpfc_nvme: Mark expected switch fall-through
  scsi: lpfc: lpfc_nportdisc: Mark expected switch fall-through
  scsi: lpfc: lpfc_hbadisc: Mark expected switch fall-throughs
  scsi: lpfc: lpfc_els: Mark expected switch fall-throughs
  scsi: lpfc: lpfc_ct: Mark expected switch fall-throughs
  scsi: imm: mark expected switch fall-throughs
  scsi: csiostor: csio_wr: mark expected switch fall-through
  ...

66 files changed, 216 insertions, 68 deletions

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 000a2f4c0e92..f070f7200fc0 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1778,7 +1778,7 @@ static inline void __drbd_chk_io_error_(struct drbd_device *device,
 				_drbd_set_state(_NS(device, disk, D_INCONSISTENT), CS_HARD, NULL);
 			break;
 		}
-		/* NOTE fall through for DRBD_META_IO_ERROR or DRBD_FORCE_DETACH */
+		/* fall through - for DRBD_META_IO_ERROR or DRBD_FORCE_DETACH */
 	case EP_DETACH:
 	case EP_CALL_HELPER:
 		/* Remember whether we saw a READ or WRITE error.
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index c850bdb6c178..6a727df02889 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3094,7 +3094,7 @@ static int drbd_asb_recover_0p(struct drbd_peer_device *peer_device) __must_hold
 			rv =  1;
 			break;
 		}
-		/* Else fall through to one of the other strategies... */
+		/* Else fall through - to one of the other strategies... */
 	case ASB_DISCARD_OLDER_PRI:
 		if (self == 0 && peer == 1) {
 			rv = 1;
@@ -3119,7 +3119,7 @@ static int drbd_asb_recover_0p(struct drbd_peer_device *peer_device) __must_hold
 		}
 		if (after_sb_0p == ASB_DISCARD_ZERO_CHG)
 			break;
-		/* else: fall through */
+		/* else, fall through */
 	case ASB_DISCARD_LEAST_CHG:
 		if	(ch_self < ch_peer)
 			rv = -1;
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 643a04af213b..3809c7e6be8c 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -866,7 +866,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
 			} /* else: FIXME can this happen? */
 			break;
 		}
-		/* else, fall through to BARRIER_ACKED */
+		/* else, fall through - to BARRIER_ACKED */
 
 	case BARRIER_ACKED:
 		/* barrier ack for READ requests does not make sense */
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 0cf4509d575c..898d522e8338 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -439,6 +439,7 @@ static void card_state_change(struct rsxx_cardinfo *card,
 		 * Fall through so the DMA devices can be attached and
 		 * the user can attempt to pull off their data.
 		 */
+		/* fall through */
 	case CARD_STATE_GOOD:
 		st = rsxx_get_card_size8(card, &card->size8);
 		if (st)
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmi.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmi.c
index d131cca999dd..10f2aa9f29a4 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmi.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/hdmi.c
@@ -23,38 +23,55 @@ void pack_hdmi_infoframe(struct packed_hdmi_infoframe *packed_frame,
 		 */
 	case 17:
 		subpack1_high = (raw_frame[16] << 16);
+		/* fall through */
 	case 16:
 		subpack1_high |= (raw_frame[15] << 8);
+		/* fall through */
 	case 15:
 		subpack1_high |= raw_frame[14];
+		/* fall through */
 	case 14:
 		subpack1_low = (raw_frame[13] << 24);
+		/* fall through */
 	case 13:
 		subpack1_low |= (raw_frame[12] << 16);
+		/* fall through */
 	case 12:
 		subpack1_low |= (raw_frame[11] << 8);
+		/* fall through */
 	case 11:
 		subpack1_low |= raw_frame[10];
+		/* fall through */
 	case 10:
 		subpack0_high = (raw_frame[9] << 16);
+		/* fall through */
 	case 9:
 		subpack0_high |= (raw_frame[8] << 8);
+		/* fall through */
 	case 8:
 		subpack0_high |= raw_frame[7];
+		/* fall through */
 	case 7:
 		subpack0_low = (raw_frame[6] << 24);
+		/* fall through */
 	case 6:
 		subpack0_low |= (raw_frame[5] << 16);
+		/* fall through */
 	case 5:
 		subpack0_low |= (raw_frame[4] << 8);
+		/* fall through */
 	case 4:
 		subpack0_low |= raw_frame[3];
+		/* fall through */
 	case 3:
 		header = (raw_frame[2] << 16);
+		/* fall through */
 	case 2:
 		header |= (raw_frame[1] << 8);
+		/* fall through */
 	case 1:
 		header |= raw_frame[0];
+		/* fall through */
 	case 0:
 		break;
 	}
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.c b/drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.c
index 49ef7e57aad4..7f1adab21a5f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.c
@@ -122,6 +122,7 @@ nv04_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass,
 		break;
 	case NV_MEM_ACCESS_WO:
 		dmaobj->flags0 |= 0x00008000;
+		/* fall through */
 	case NV_MEM_ACCESS_RW:
 		dmaobj->flags2 |= 0x00000002;
 		break;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
index ad707ff176cc..93493b335d76 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
@@ -117,8 +117,10 @@ nv04_fifo_swmthd(struct nvkm_device *device, u32 chid, u32 addr, u32 data)
 	switch (mthd) {
 	case 0x0000 ... 0x0000: /* subchannel's engine -> software */
 		nvkm_wr32(device, 0x003280, (engine &= ~mask));
+		/* fall through */
 	case 0x0180 ... 0x01fc: /* handle -> instance */
 		data = nvkm_rd32(device, 0x003258) & 0x0000ffff;
+		/* fall through */
 	case 0x0100 ... 0x017c:
 	case 0x0200 ... 0x1ffc: /* pass method down to sw */
 		if (!(engine & mask) && sw)
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
index 8c7ba32763c4..47c16821c37f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
@@ -81,6 +81,7 @@ nv40_fifo_init(struct nvkm_fifo *base)
 	case 0x49:
 	case 0x4b:
 		nvkm_wr32(device, 0x002230, 0x00000001);
+		/* fall through */
 	case 0x40:
 	case 0x41:
 	case 0x42:
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
index c3068358f695..7112992e0e38 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
@@ -135,6 +135,7 @@ nvbios_perfEp(struct nvkm_bios *bios, int idx,
 		break;
 	case 0x30:
 		info->script   = nvbios_rd16(bios, perf + 0x02);
+		/* fall through */
 	case 0x35:
 		info->fanspeed = nvbios_rd08(bios, perf + 0x06);
 		info->voltage  = nvbios_rd08(bios, perf + 0x07);
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
index e6e804cee2bc..bda6cc9a7aaf 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pll.c
@@ -134,6 +134,7 @@ pll_map(struct nvkm_bios *bios)
 		    device->chipset == 0xaa ||
 		    device->chipset == 0xac)
 			return g84_pll_mapping;
+		/* fall through */
 	default:
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
index ba6a868d4c95..40e564524b7a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
@@ -90,6 +90,7 @@ nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate,
 			case NVKM_CLK_BOOST_NONE:
 				if (clk->base_khz && freq > clk->base_khz)
 					return false;
+				/* fall through */
 			case NVKM_CLK_BOOST_BIOS:
 				if (clk->boost_khz && freq > clk->boost_khz)
 					return false;
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
index 1c21b8b53b78..4f000237796f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c
@@ -363,6 +363,7 @@ mcp77_clk_prog(struct nvkm_clk *base)
 	switch (clk->vsrc) {
 	case nv_clk_src_cclk:
 		mast |= 0x00400000;
+		/* fall through */
 	default:
 		nvkm_wr32(device, 0x4600, clk->vdiv);
 	}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv40.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv40.c
index 2b12e388f47a..5f4c287d7943 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv40.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv40.c
@@ -131,11 +131,13 @@ nv40_ram_prog(struct nvkm_ram *base)
 		nvkm_mask(device, 0x00402c, 0xc0771100, ram->ctrl);
 		nvkm_wr32(device, 0x004048, ram->coef);
 		nvkm_wr32(device, 0x004030, ram->coef);
+		/* fall through */
 	case 0x43:
 	case 0x49:
 	case 0x4b:
 		nvkm_mask(device, 0x004038, 0xc0771100, ram->ctrl);
 		nvkm_wr32(device, 0x00403c, ram->coef);
+		/* fall through */
 	default:
 		nvkm_mask(device, 0x004020, 0xc0771100, ram->ctrl);
 		nvkm_wr32(device, 0x004024, ram->coef);
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c
index 844971e5e874..2a6150ab5611 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c
@@ -159,6 +159,7 @@ mxm_dcb_sanitise_entry(struct nvkm_bios *bios, void *data, int idx, u16 pdcb)
 		break;
 	case 0x0e: /* eDP, falls through to DPint */
 		ctx.outp[1] |= 0x00010000;
+		/* fall through */
 	case 0x07: /* DP internal, wtf is this?? HP8670w */
 		ctx.outp[1] |= 0x00000004; /* use_power_scripts? */
 		type = DCB_CONNECTOR_eDP;
diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index e3a5af65dbce..b4f3d64e7da8 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -259,9 +259,11 @@ static unsigned int jmb38x_ms_write_data(struct jmb38x_ms_host *host,
 	case 3:
 		host->io_word[0] |= buf[off + 2] << 16;
 		host->io_pos++;
+		/* fall through */
 	case 2:
 		host->io_word[0] |= buf[off + 1] << 8;
 		host->io_pos++;
+		/* fall through */
 	case 1:
 		host->io_word[0] |= buf[off];
 		host->io_pos++;
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index bed205849d02..1bbb2ead9556 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -166,9 +166,11 @@ static unsigned int tifm_ms_write_data(struct tifm_ms *host,
 	case 3:
 		host->io_word |= buf[off + 2] << 16;
 		host->io_pos++;
+		/* fall through */
 	case 2:
 		host->io_word |= buf[off + 1] << 8;
 		host->io_pos++;
+		/* fall through */
 	case 1:
 		host->io_word |= buf[off];
 		host->io_pos++;
diff --git a/drivers/nfc/pn533/pn533.c b/drivers/nfc/pn533/pn533.c
index a0cc1cc45292..5961f14259e5 100644
--- a/drivers/nfc/pn533/pn533.c
+++ b/drivers/nfc/pn533/pn533.c
@@ -2147,6 +2147,7 @@ static int pn533_transceive(struct nfc_dev *nfc_dev,
 
 			break;
 		}
+		/* fall through */
 	default:
 		/* jumbo frame ? */
 		if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
@@ -2273,6 +2274,7 @@ static void pn533_wq_mi_recv(struct work_struct *work)
 
 			break;
 		}
+		/* fall through */
 	default:
 		skb_put_u8(skb, 1); /*TG*/
 
diff --git a/drivers/nfc/st21nfca/dep.c b/drivers/nfc/st21nfca/dep.c
index fd08be2917e6..c005997493af 100644
--- a/drivers/nfc/st21nfca/dep.c
+++ b/drivers/nfc/st21nfca/dep.c
@@ -400,6 +400,7 @@ static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev,
 		default:
 			return 1;
 		}
+		break;
 	default:
 		return 1;
 	}
@@ -619,6 +620,7 @@ static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
 		switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) {
 		case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
 			pr_err("Received a ACK/NACK PDU\n");
+			/* fall through */
 		case ST21NFCA_NFC_DEP_PFB_I_PDU:
 			info->dep_info.curr_nfc_dep_pni =
 			    ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1);
diff --git a/drivers/scsi/aic7xxx/aic7xxx_core.c b/drivers/scsi/aic7xxx/aic7xxx_core.c
index f3362f4ab16e..d4a7263e4b8f 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_core.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_core.c
@@ -4920,24 +4920,30 @@ ahc_fini_scbdata(struct ahc_softc *ahc)
 		}
 		ahc_dma_tag_destroy(ahc, scb_data->sg_dmat);
 	}
+		/* fall through */
 	case 6:
 		ahc_dmamap_unload(ahc, scb_data->sense_dmat,
 				  scb_data->sense_dmamap);
+		/* fall through */
 	case 5:
 		ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
 				scb_data->sense_dmamap);
 		ahc_dmamap_destroy(ahc, scb_data->sense_dmat,
 				   scb_data->sense_dmamap);
+		/* fall through */
 	case 4:
 		ahc_dma_tag_destroy(ahc, scb_data->sense_dmat);
+		/* fall through */
 	case 3:
 		ahc_dmamap_unload(ahc, scb_data->hscb_dmat,
 				  scb_data->hscb_dmamap);
+		/* fall through */
 	case 2:
 		ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
 				scb_data->hscb_dmamap);
 		ahc_dmamap_destroy(ahc, scb_data->hscb_dmat,
 				   scb_data->hscb_dmamap);
+		/* fall through */
 	case 1:
 		ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat);
 		break;
@@ -6002,8 +6008,8 @@ ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
 				if ((scb->flags & SCB_ACTIVE) == 0)
 					printk("Inactive SCB in Waiting List\n");
 				ahc_done(ahc, scb);
-				/* FALLTHROUGH */
 			}
+				/* fall through */
 			case SEARCH_REMOVE:
 				next = ahc_rem_wscb(ahc, next, prev);
 				break;
@@ -7008,8 +7014,8 @@ ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
 		}
 		address -= address_offset;
 		fmt3_ins->address = address;
-		/* FALLTHROUGH */
 	}
+		/* fall through */
 	case AIC_OP_OR:
 	case AIC_OP_AND:
 	case AIC_OP_XOR:
@@ -7035,7 +7041,7 @@ ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
 			fmt1_ins->opcode = AIC_OP_AND;
 			fmt1_ins->immediate = 0xff;
 		}
-		/* FALLTHROUGH */
+		/* fall through */
 	case AIC_OP_ROL:
 		if ((ahc->features & AHC_ULTRA2) != 0) {
 			int i, count;
diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index 96b96e2ab91a..ed1bd369baa0 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -679,6 +679,7 @@ int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 		if (conn->max_xmit_dlength > 65536)
 			conn->max_xmit_dlength = 65536;
+		/* fall through */
 	default:
 		return 0;
 	}
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 76e49d902609..0760d0bd8a10 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -1532,6 +1532,7 @@ beiscsi_hdl_get_handle(struct beiscsi_conn *beiscsi_conn,
 		break;
 	case UNSOL_DATA_DIGEST_ERROR_NOTIFY:
 		error = 1;
+		/* fall through */
 	case UNSOL_DATA_NOTIFY:
 		pasync_handle = pasync_ctx->async_entry[ci].data;
 		break;
diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index 2c85f5b1f9c1..7e996bcf026c 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -2586,6 +2586,7 @@ bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim)
 	case FCP_IODIR_RW:
 		bfa_stats(itnim, input_reqs);
 		bfa_stats(itnim, output_reqs);
+		/* fall through */
 	default:
 		bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_fn_lpu(ioim->bfa));
 	}
@@ -2820,6 +2821,7 @@ bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 
 	case BFI_IOIM_STS_TIMEDOUT:
 		bfa_stats(ioim->itnim, iocomp_timedout);
+		/* fall through */
 	case BFI_IOIM_STS_ABORTED:
 		rsp->io_status = BFI_IOIM_STS_ABORTED;
 		bfa_stats(ioim->itnim, iocomp_aborted);
@@ -3215,9 +3217,7 @@ bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
 	switch (event) {
 	case BFA_TSKIM_SM_DONE:
 		bfa_reqq_wcancel(&tskim->reqq_wait);
-		/*
-		 * Fall through !!!
-		 */
+		/* fall through */
 	case BFA_TSKIM_SM_QRESUME:
 		bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
 		bfa_tskim_send_abort(tskim);
diff --git a/drivers/scsi/csiostor/csio_wr.c b/drivers/scsi/csiostor/csio_wr.c
index 66bbd21819ae..03bd896cdbb9 100644
--- a/drivers/scsi/csiostor/csio_wr.c
+++ b/drivers/scsi/csiostor/csio_wr.c
@@ -808,6 +808,7 @@ csio_wr_destroy_queues(struct csio_hw *hw, bool cmd)
 
 				csio_q_eqid(hw, i) = CSIO_MAX_QID;
 			}
+			/* fall through */
 		case CSIO_INGRESS:
 			if (csio_q_iqid(hw, i) != CSIO_MAX_QID) {
 				csio_wr_cleanup_iq_ftr(hw, i);
diff --git a/drivers/scsi/imm.c b/drivers/scsi/imm.c
index cea7f502e8ca..64ae418d29f3 100644
--- a/drivers/scsi/imm.c
+++ b/drivers/scsi/imm.c
@@ -796,21 +796,21 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 			return 0;
 		}
 		return 1;	/* wait until imm_wakeup claims parport */
-		/* Phase 1 - Connected */
-	case 1:
+
+	case 1:		/* Phase 1 - Connected */
 		imm_connect(dev, CONNECT_EPP_MAYBE);
 		cmd->SCp.phase++;
+		/* fall through */
 
-		/* Phase 2 - We are now talking to the scsi bus */
-	case 2:
+	case 2:		/* Phase 2 - We are now talking to the scsi bus */
 		if (!imm_select(dev, scmd_id(cmd))) {
 			imm_fail(dev, DID_NO_CONNECT);
 			return 0;
 		}
 		cmd->SCp.phase++;
+		/* fall through */
 
-		/* Phase 3 - Ready to accept a command */
-	case 3:
+	case 3:		/* Phase 3 - Ready to accept a command */
 		w_ctr(ppb, 0x0c);
 		if (!(r_str(ppb) & 0x80))
 			return 1;
@@ -818,9 +818,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 		if (!imm_send_command(cmd))
 			return 0;
 		cmd->SCp.phase++;
+		/* fall through */
 
-		/* Phase 4 - Setup scatter/gather buffers */
-	case 4:
+	case 4:		/* Phase 4 - Setup scatter/gather buffers */
 		if (scsi_bufflen(cmd)) {
 			cmd->SCp.buffer = scsi_sglist(cmd);
 			cmd->SCp.this_residual = cmd->SCp.buffer->length;
@@ -834,8 +834,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 		cmd->SCp.phase++;
 		if (cmd->SCp.this_residual & 0x01)
 			cmd->SCp.this_residual++;
-		/* Phase 5 - Pre-Data transfer stage */
-	case 5:
+		/* fall through */
+
+	case 5:		/* Phase 5 - Pre-Data transfer stage */
 		/* Spin lock for BUSY */
 		w_ctr(ppb, 0x0c);
 		if (!(r_str(ppb) & 0x80))
@@ -850,9 +851,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 			if (imm_negotiate(dev))
 				return 0;
 		cmd->SCp.phase++;
+		/* fall through */
 
-		/* Phase 6 - Data transfer stage */
-	case 6:
+	case 6:		/* Phase 6 - Data transfer stage */
 		/* Spin lock for BUSY */
 		w_ctr(ppb, 0x0c);
 		if (!(r_str(ppb) & 0x80))
@@ -866,9 +867,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 				return 1;
 		}
 		cmd->SCp.phase++;
+		/* fall through */
 
-		/* Phase 7 - Post data transfer stage */
-	case 7:
+	case 7:		/* Phase 7 - Post data transfer stage */
 		if ((dev->dp) && (dev->rd)) {
 			if ((dev->mode == IMM_NIBBLE) || (dev->mode == IMM_PS2)) {
 				w_ctr(ppb, 0x4);
@@ -878,9 +879,9 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 			}
 		}
 		cmd->SCp.phase++;
+		/* fall through */
 
-		/* Phase 8 - Read status/message */
-	case 8:
+	case 8:		/* Phase 8 - Read status/message */
 		/* Check for data overrun */
 		if (imm_wait(dev) != (unsigned char) 0xb8) {
 			imm_fail(dev, DID_ERROR);
diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index 7290573110fe..44f426347d4f 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -3092,6 +3092,7 @@ port_out:
 	case SLI_MGMT_GHAT:
 	case SLI_MGMT_GRPL:
 		rsp_size = FC_MAX_NS_RSP;
+		/* fall through */
 	case SLI_MGMT_DHBA:
 	case SLI_MGMT_DHAT:
 		pe = (struct lpfc_fdmi_port_entry *)&CtReq->un.PortID;
@@ -3104,6 +3105,7 @@ port_out:
 	case SLI_MGMT_GPAT:
 	case SLI_MGMT_GPAS:
 		rsp_size = FC_MAX_NS_RSP;
+		/* fall through */
 	case SLI_MGMT_DPRT:
 	case SLI_MGMT_DPA:
 		pe = (struct lpfc_fdmi_port_entry *)&CtReq->un.PortID;
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index fc077cb87900..7b0755e3527d 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -8775,6 +8775,7 @@ lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 				lpfc_nlp_put(ndlp);
 				return;
 			}
+			/* fall through */
 
 		default:
 			/* Try to recover from this error */
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index aa4961a2caf8..14fffbebbbb5 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -4667,9 +4667,11 @@ lpfc_check_sli_ndlp(struct lpfc_hba *phba,
 		case CMD_GEN_REQUEST64_CR:
 			if (iocb->context_un.ndlp == ndlp)
 				return 1;
+			/* fall through */
 		case CMD_ELS_REQUEST64_CR:
 			if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
 				return 1;
+			/* fall through */
 		case CMD_XMIT_ELS_RSP64_CX:
 			if (iocb->context1 == (uint8_t *) ndlp)
 				return 1;
@@ -5856,7 +5858,7 @@ restart_disc:
 
 	case LPFC_LINK_UP:
 		lpfc_issue_clear_la(phba, vport);
-		/* Drop thru */
+		/* fall through */
 	case LPFC_LINK_UNKNOWN:
 	case LPFC_WARM_START:
 	case LPFC_INIT_START:
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index 6172682a24ba..11d284c5486e 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -360,6 +360,7 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	case  NLP_STE_NPR_NODE:
 		if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 			break;
+		/* fall through */
 	case  NLP_STE_REG_LOGIN_ISSUE:
 	case  NLP_STE_PRLI_ISSUE:
 	case  NLP_STE_UNMAPPED_NODE:
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
index 1aa00d2c3f74..d16ca413110d 100644
--- a/drivers/scsi/lpfc/lpfc_nvme.c
+++ b/drivers/scsi/lpfc/lpfc_nvme.c
@@ -1106,6 +1106,7 @@ lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
 					 lpfc_ncmd, nCmd,
 					 lpfc_ncmd->cur_iocbq.sli4_xritag,
 					 bf_get(lpfc_wcqe_c_xb, wcqe));
+			/* fall through */
 		default:
 out_err:
 			lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index a497b2c0cb79..ff3c5e0f4e2b 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -1137,7 +1137,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 
 					break;
 				}
-				/* Drop thru */
+				/* fall through */
 			case SCSI_PROT_WRITE_INSERT:
 				/*
 				 * For WRITE_INSERT, force the error
@@ -1256,7 +1256,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 					rc = BG_ERR_TGT | BG_ERR_CHECK;
 					break;
 				}
-				/* Drop thru */
+				/* fall through */
 			case SCSI_PROT_WRITE_INSERT:
 				/*
 				 * For WRITE_INSERT, force the
@@ -1338,7 +1338,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 			switch (op) {
 			case SCSI_PROT_WRITE_PASS:
 				rc = BG_ERR_CHECK;
-				/* Drop thru */
+				/* fall through */
 
 			case SCSI_PROT_WRITE_INSERT:
 				/*
@@ -3822,7 +3822,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 					lpfc_cmd->cur_iocbq.sli4_lxritag,
 					0, 0);
 			}
-		/* else: fall through */
+			/* fall through */
 		default:
 			cmd->result = DID_ERROR << 16;
 			break;
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index be3c73ebbfde..4bad54463eb2 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -216,12 +216,14 @@ static void osst_analyze_sense(struct osst_request *SRpnt, struct st_cmdstatus *
 		switch (sense[0] & 0x7f) {
 		case 0x71:
 			s->deferred = 1;
+			/* fall through */
 		case 0x70:
 			s->fixed_format = 1;
 			s->flags = sense[2] & 0xe0;
 			break;
 		case 0x73:
 			s->deferred = 1;
+			/* fall through */
 		case 0x72:
 			s->fixed_format = 0;
 			ucp = scsi_sense_desc_find(sense, SCSI_SENSE_BUFFERSIZE, 4);
@@ -591,6 +593,7 @@ static void osst_init_aux(struct osst_tape * STp, int frame_type, int frame_seq_
 		dat->dat_list[0].flags    = frame_type==OS_FRAME_TYPE_MARKER?
 							OS_DAT_FLAGS_MARK:OS_DAT_FLAGS_DATA;
 		dat->dat_list[0].reserved = 0;
+		/* fall through */
 	  case	OS_FRAME_TYPE_EOD:
 		aux->update_frame_cntr    = htonl(0);
 		par->partition_num        = OS_DATA_PARTITION;
@@ -4086,6 +4089,7 @@ static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt,
 	switch (cmd_in) {
 	 case MTFSFM:
 		chg_eof = 0; /* Changed from the FSF after this */
+		/* fall through */
 	 case MTFSF:
 		if (STp->raw)
 		   return (-EIO);
@@ -4101,6 +4105,7 @@ static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt,
 
 	 case MTBSF:
 		chg_eof = 0; /* Changed from the FSF after this */
+		/* fall through */
 	 case MTBSFM:
 		if (STp->raw)
 		   return (-EIO);
@@ -4312,6 +4317,7 @@ static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt,
 					   name, STp->block_size);
 			 return 0;
 		 }
+		/* fall through */
 	 case MTSETDENSITY:       /* Set tape density */
 	 case MTSETDRVBUFFER:     /* Set drive buffering */
 	 case SET_DENS_AND_BLK:   /* Set density and block size */
diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index c182b5458f98..35213082e933 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -717,6 +717,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
 			}
 			cmd->SCp.phase++;
 		}
+		/* fall through */
 
 	case 2:		/* Phase 2 - We are now talking to the scsi bus */
 		if (!ppa_select(dev, scmd_id(cmd))) {
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index 0a2a54517b15..054fb0599263 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -3072,6 +3072,7 @@ static void sym_sir_bad_scsi_status(struct sym_hcb *np, int num, struct sym_ccb
 			sym_print_addr(cp->cmd, "%s\n",
 			        s_status == S_BUSY ? "BUSY" : "QUEUE FULL\n");
 		}
+		/* fall through */
 	default:	/* S_INT, S_INT_COND_MET, S_CONFLICT */
 		sym_complete_error (np, cp);
 		break;
@@ -4632,6 +4633,7 @@ static void sym_int_sir(struct sym_hcb *np)
 	 *  Negotiation failed.
 	 *  Target does not want answer message.
 	 */
+	/* fall through */
 	case SIR_NEGO_PROTO:
 		sym_nego_default(np, tp, cp);
 		goto out;
diff --git a/drivers/scsi/sym53c8xx_2/sym_nvram.c b/drivers/scsi/sym53c8xx_2/sym_nvram.c
index 5662fbb3ff60..0d37b4f07b5e 100644
--- a/drivers/scsi/sym53c8xx_2/sym_nvram.c
+++ b/drivers/scsi/sym53c8xx_2/sym_nvram.c
@@ -708,6 +708,7 @@ static int sym_read_Tekram_nvram (struct sym_device *np, Tekram_nvram *nvram)
 					  data, len);
 		if (!x)
 			break;
+		/* fall through */
 	default:
 		x = sym_read_T93C46_nvram(np, nvram);
 		break;
diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index 0fbfd0b04ae0..382c9d7ad375 100644
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -24,8 +24,11 @@ static inline unsigned int adfs_readval(unsigned char *p, int len)
 
 	switch (len) {
 	case 4:		val |= p[3] << 24;
+			/* fall through */
 	case 3:		val |= p[2] << 16;
+			/* fall through */
 	case 2:		val |= p[1] << 8;
+			/* fall through */
 	default:	val |= p[0];
 	}
 	return val;
@@ -35,8 +38,11 @@ static inline void adfs_writeval(unsigned char *p, int len, unsigned int val)
 {
 	switch (len) {
 	case 4:		p[3] = val >> 24;
+			/* fall through */
 	case 3:		p[2] = val >> 16;
+			/* fall through */
 	case 2:		p[1] = val >> 8;
+			/* fall through */
 	default:	p[0] = val;
 	}
 }
diff --git a/fs/affs/super.c b/fs/affs/super.c
index d58217f0baaa..7370228eefb2 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -481,7 +481,7 @@ got_root:
 		break;
 	case MUFS_OFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
-		/* fall thru */
+		/* fall through */
 	case FS_OFS:
 		affs_set_opt(sbi->s_flags, SF_OFS);
 		sb->s_flags |= SB_NOEXEC;
@@ -489,6 +489,7 @@ got_root:
 	case MUFS_DCOFS:
 	case MUFS_INTLOFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
+		/* fall through */
 	case FS_DCOFS:
 	case FS_INTLOFS:
 		affs_set_opt(sbi->s_flags, SF_INTL);
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 2f8acb4c556d..748090014519 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -285,6 +285,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the FID array and its count in two steps */
+		/* fall through */
 	case 1:
 		_debug("extract FID count");
 		ret = afs_extract_data(call, true);
@@ -304,6 +305,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		afs_extract_to_buf(call, call->count * 3 * 4);
 		call->unmarshall++;
 
+		/* Fall through */
 	case 2:
 		_debug("extract FID array");
 		ret = afs_extract_data(call, true);
@@ -329,6 +331,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the callback array and its count in two steps */
+		/* fall through */
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -344,6 +347,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		iov_iter_discard(&call->iter, READ, call->count2 * 3 * 4);
 		call->unmarshall++;
 
+		/* Fall through */
 	case 4:
 		_debug("extract discard %zu/%u",
 		       iov_iter_count(&call->iter), call->count2 * 3 * 4);
@@ -422,6 +426,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
 		afs_extract_to_buf(call, 11 * sizeof(__be32));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 1:
 		_debug("extract UUID");
 		ret = afs_extract_data(call, false);
@@ -537,6 +542,7 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call)
 		afs_extract_to_buf(call, 11 * sizeof(__be32));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 1:
 		_debug("extract UUID");
 		ret = afs_extract_data(call, false);
@@ -673,6 +679,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the FID array and its count in two steps */
+		/* Fall through */
 	case 1:
 		_debug("extract FID count");
 		ret = afs_extract_data(call, true);
@@ -692,6 +699,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
+		/* Fall through */
 	case 2:
 		_debug("extract FID array");
 		ret = afs_extract_data(call, false);
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 323ae9912203..e8d6619890a9 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -300,6 +300,8 @@ int afs_page_filler(void *data, struct page *page)
 		/* page will not be cached */
 	case -ENOBUFS:
 		_debug("cache said ENOBUFS");
+
+		/* fall through */
 	default:
 	go_on:
 		req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *),
diff --git a/fs/afs/flock.c b/fs/afs/flock.c
index e432bd27a2e7..6a0174258382 100644
--- a/fs/afs/flock.c
+++ b/fs/afs/flock.c
@@ -303,6 +303,7 @@ again:
 			return;
 		}
 
+		/* Fall through */
 	default:
 		/* Looks like a lock request was withdrawn. */
 		spin_unlock(&vnode->lock);
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 0b37867b5c20..b68471ce5c35 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -498,7 +498,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 			afs_extract_to_tmp(call);
 		}
 
-		/* extract the returned data length */
+		/* Fall through - and extract the returned data length */
 	case 1:
 		_debug("extract data length");
 		ret = afs_extract_data(call, true);
@@ -525,7 +525,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
 		ASSERTCMP(size, <=, PAGE_SIZE);
 
-		/* extract the returned data */
+		/* Fall through - and extract the returned data */
 	case 2:
 		_debug("extract data %zu/%llu",
 		       iov_iter_count(&call->iter), req->remain);
@@ -552,6 +552,8 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		/* Discard any excess data the server gave us */
 		iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
 		call->unmarshall = 3;
+
+		/* Fall through */
 	case 3:
 		_debug("extract discard %zu/%llu",
 		       iov_iter_count(&call->iter), req->actual_len - req->len);
@@ -564,7 +566,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		call->unmarshall = 4;
 		afs_extract_to_buf(call, (21 + 3 + 6) * 4);
 
-		/* extract the metadata */
+		/* Fall through - and extract the metadata */
 	case 4:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -1634,7 +1636,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_to_buf(call, 12 * 4);
 
-		/* extract the returned status record */
+		/* Fall through - and extract the returned status record */
 	case 1:
 		_debug("extract status");
 		ret = afs_extract_data(call, true);
@@ -1646,7 +1648,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
 
-		/* extract the volume name length */
+		/* Fall through - and extract the volume name length */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1661,7 +1663,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_begin(call, call->reply[2], size);
 		call->unmarshall++;
 
-		/* extract the volume name */
+		/* Fall through - and extract the volume name */
 	case 3:
 		_debug("extract volname");
 		ret = afs_extract_data(call, true);
@@ -1674,7 +1676,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the offline message length */
+		/* Fall through - and extract the offline message length */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1689,7 +1691,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_begin(call, call->reply[2], size);
 		call->unmarshall++;
 
-		/* extract the offline message */
+		/* Fall through - and extract the offline message */
 	case 5:
 		_debug("extract offline");
 		ret = afs_extract_data(call, true);
@@ -1703,7 +1705,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the message of the day length */
+		/* Fall through - and extract the message of the day length */
 	case 6:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1718,7 +1720,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_begin(call, call->reply[2], size);
 		call->unmarshall++;
 
-		/* extract the message of the day */
+		/* Fall through - and extract the message of the day */
 	case 7:
 		_debug("extract motd");
 		ret = afs_extract_data(call, false);
@@ -2016,7 +2018,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* Extract the capabilities word count */
+		/* Fall through - and extract the capabilities word count */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -2029,7 +2031,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 		iov_iter_discard(&call->iter, READ, count * sizeof(__be32));
 		call->unmarshall++;
 
-		/* Extract capabilities words */
+		/* Fall through - and extract capabilities words */
 	case 2:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -2206,6 +2208,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 
 		/* Extract the file status count and array in two steps */
+		/* Fall through */
 	case 1:
 		_debug("extract status count");
 		ret = afs_extract_data(call, true);
@@ -2223,6 +2226,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_counts:
 		afs_extract_to_buf(call, 21 * sizeof(__be32));
 
+		/* Fall through */
 	case 2:
 		_debug("extract status array %u", call->count);
 		ret = afs_extract_data(call, true);
@@ -2246,6 +2250,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 
 		/* Extract the callback count and array in two steps */
+		/* Fall through */
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -2262,6 +2267,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_cbs:
 		afs_extract_to_buf(call, 3 * sizeof(__be32));
 
+		/* Fall through */
 	case 4:
 		_debug("extract CB array");
 		ret = afs_extract_data(call, true);
@@ -2284,6 +2290,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_buf(call, 6 * sizeof(__be32));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index bbb1fd51b019..7f2af061ea06 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -131,33 +131,42 @@ void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
 		if (e->error == -ETIMEDOUT ||
 		    e->error == -ETIME)
 			return;
+		/* Fall through */
 	case -ETIMEDOUT:
 	case -ETIME:
 		if (e->error == -ENOMEM ||
 		    e->error == -ENONET)
 			return;
+		/* Fall through */
 	case -ENOMEM:
 	case -ENONET:
 		if (e->error == -ERFKILL)
 			return;
+		/* Fall through */
 	case -ERFKILL:
 		if (e->error == -EADDRNOTAVAIL)
 			return;
+		/* Fall through */
 	case -EADDRNOTAVAIL:
 		if (e->error == -ENETUNREACH)
 			return;
+		/* Fall through */
 	case -ENETUNREACH:
 		if (e->error == -EHOSTUNREACH)
 			return;
+		/* Fall through */
 	case -EHOSTUNREACH:
 		if (e->error == -EHOSTDOWN)
 			return;
+		/* Fall through */
 	case -EHOSTDOWN:
 		if (e->error == -ECONNREFUSED)
 			return;
+		/* Fall through */
 	case -ECONNREFUSED:
 		if (e->error == -ECONNRESET)
 			return;
+		/* Fall through */
 	case -ECONNRESET: /* Responded, but call expired. */
 		if (e->responded)
 			return;
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 15c7e82d80cb..3ed2c99c58ab 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -923,6 +923,7 @@ void afs_send_empty_reply(struct afs_call *call)
 		_debug("oom");
 		rxrpc_kernel_abort_call(net->socket, call->rxcall,
 					RX_USER_ABORT, -ENOMEM, "KOO");
+		/* Fall through */
 	default:
 		_leave(" [error]");
 		return;
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index c3d9e5a5f67e..b0175b3ef0e8 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -195,7 +195,9 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 				   sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
 		call->unmarshall++;
 
-		/* Extract the returned uuid, uniquifier, nentries and blkaddrs size */
+		/* Extract the returned uuid, uniquifier, nentries and
+		 * blkaddrs size */
+		/* Fall through */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -220,7 +222,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 		count = min(call->count, 4U);
 		afs_extract_to_buf(call, count * sizeof(__be32));
 
-		/* Extract entries */
+		/* Fall through - and extract entries */
 	case 2:
 		ret = afs_extract_data(call, call->count > 4);
 		if (ret < 0)
@@ -323,7 +325,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* Extract the capabilities word count */
+		/* Fall through - and extract the capabilities word count */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -336,7 +338,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_discard(call, count * sizeof(__be32));
 
-		/* Extract capabilities words */
+		/* Fall through - and extract capabilities words */
 	case 2:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -436,6 +438,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		/* Extract the returned uuid, uniquifier, fsEndpoints count and
 		 * either the first fsEndpoint type or the volEndpoints
 		 * count if there are no fsEndpoints. */
+		/* Fall through */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -476,7 +479,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall = 2;
 
-		/* Extract fsEndpoints[] entries */
+		/* Fall through - and extract fsEndpoints[] entries */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -529,6 +532,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		 * extract the type of the next endpoint when we extract the
 		 * data of the current one, but this is the first...
 		 */
+		/* Fall through */
 	case 3:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -555,7 +559,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall = 4;
 
-		/* Extract volEndpoints[] entries */
+		/* Fall through - and extract volEndpoints[] entries */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -591,7 +595,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_discard(call, 0);
 		call->unmarshall = 5;
 
-		/* Done */
+		/* Fall through - Done */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c
index 6e97a42d24d1..871e29f06257 100644
--- a/fs/afs/yfsclient.c
+++ b/fs/afs/yfsclient.c
@@ -544,7 +544,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		afs_extract_to_tmp64(call);
 		call->unmarshall++;
 
-		/* extract the returned data length */
+		/* Fall through - and extract the returned data length */
 	case 1:
 		_debug("extract data length");
 		ret = afs_extract_data(call, true);
@@ -571,7 +571,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
 		ASSERTCMP(size, <=, PAGE_SIZE);
 
-		/* extract the returned data */
+		/* Fall through - and extract the returned data */
 	case 2:
 		_debug("extract data %zu/%llu",
 		       iov_iter_count(&call->iter), req->remain);
@@ -598,6 +598,8 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		/* Discard any excess data the server gave us */
 		iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
 		call->unmarshall = 3;
+
+		/* Fall through */
 	case 3:
 		_debug("extract discard %zu/%llu",
 		       iov_iter_count(&call->iter), req->actual_len - req->len);
@@ -613,7 +615,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 				   sizeof(struct yfs_xdr_YFSCallBack) +
 				   sizeof(struct yfs_xdr_YFSVolSync));
 
-		/* extract the metadata */
+		/* Fall through - and extract the metadata */
 	case 4:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -629,6 +631,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 
 		call->unmarshall++;
 
+		/* Fall through */
 	case 5:
 		break;
 	}
@@ -1584,7 +1587,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
 
-		/* extract the returned status record */
+		/* Fall through - and extract the returned status record */
 	case 1:
 		_debug("extract status");
 		ret = afs_extract_data(call, true);
@@ -1596,7 +1599,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
 
-		/* extract the volume name length */
+		/* Fall through - and extract the volume name length */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1611,7 +1614,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_begin(call, call->reply[2], size);
 		call->unmarshall++;
 
-		/* extract the volume name */
+		/* Fall through - and extract the volume name */
 	case 3:
 		_debug("extract volname");
 		ret = afs_extract_data(call, true);
@@ -1624,7 +1627,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the offline message length */
+		/* Fall through - and extract the offline message length */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1639,7 +1642,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_begin(call, call->reply[2], size);
 		call->unmarshall++;
 
-		/* extract the offline message */
+		/* Fall through - and extract the offline message */
 	case 5:
 		_debug("extract offline");
 		ret = afs_extract_data(call, true);
@@ -1653,7 +1656,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the message of the day length */
+		/* Fall through - and extract the message of the day length */
 	case 6:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1668,7 +1671,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		afs_extract_begin(call, call->reply[2], size);
 		call->unmarshall++;
 
-		/* extract the message of the day */
+		/* Fall through - and extract the message of the day */
 	case 7:
 		_debug("extract motd");
 		ret = afs_extract_data(call, false);
@@ -1681,6 +1684,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 
 		call->unmarshall++;
 
+		/* Fall through */
 	case 8:
 		break;
 	}
@@ -2026,6 +2030,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 
 		/* Extract the file status count and array in two steps */
+		/* Fall through */
 	case 1:
 		_debug("extract status count");
 		ret = afs_extract_data(call, true);
@@ -2043,6 +2048,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_counts:
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
 
+		/* Fall through */
 	case 2:
 		_debug("extract status array %u", call->count);
 		ret = afs_extract_data(call, true);
@@ -2066,6 +2072,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 
 		/* Extract the callback count and array in two steps */
+		/* Fall through */
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -2082,6 +2089,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_cbs:
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
 
+		/* Fall through */
 	case 4:
 		_debug("extract CB array");
 		ret = afs_extract_data(call, true);
@@ -2104,6 +2112,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -2114,6 +2123,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 
 		call->unmarshall++;
 
+		/* Fall through */
 	case 6:
 		break;
 	}
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index 5cec2c6970f2..e87cbdad02a3 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -509,6 +509,7 @@ static int process_leaf(struct btrfs_root *root,
 		switch (key.type) {
 		case BTRFS_EXTENT_ITEM_KEY:
 			*num_bytes = key.offset;
+			/* fall through */
 		case BTRFS_METADATA_ITEM_KEY:
 			*bytenr = key.objectid;
 			ret = process_extent_item(fs_info, path, &key, i,
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index b8a0e8d0672d..136a3eb64604 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -394,6 +394,7 @@ static inline enum btrfs_map_op btrfs_op(struct bio *bio)
 		return BTRFS_MAP_WRITE;
 	default:
 		WARN_ON_ONCE(1);
+		/* fall through */
 	case REQ_OP_READ:
 		return BTRFS_MAP_READ;
 	}
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 9f53c3d99304..84725b53ac21 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -247,6 +247,7 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
 	case S_IFREG:
 		ceph_fscache_register_inode_cookie(inode);
 		ceph_fscache_file_set_cookie(inode, file);
+		/* fall through */
 	case S_IFDIR:
 		ret = ceph_init_file_info(inode, file, fmode,
 						S_ISDIR(inode->i_mode));
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 39843fa7e11b..591e82ba443c 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1690,9 +1690,11 @@ static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 		case 1:
 			offset += file->f_pos;
+			/* fall through */
 		case 0:
 			if (offset >= 0)
 				break;
+			/* fall through */
 		default:
 			return -EINVAL;
 	}
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 3f99ab288695..d6e48a6487d5 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -616,8 +616,10 @@ pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs)
 	switch (dn->max_level) {
 	case 3:
 		base += 2 * indirect_blks;
+		/* fall through */
 	case 2:
 		base += 2 * direct_blks;
+		/* fall through */
 	case 1:
 		base += direct_index;
 		break;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 083185174c6d..3d40771e8e7c 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -769,7 +769,7 @@ static void send_sigio_to_task(struct task_struct *p,
 			si.si_fd    = fd;
 			if (!do_send_sig_info(signum, &si, p, type))
 				break;
-		/* fall-through: fall back on the old plain SIGIO signal */
+		/* fall-through - fall back on the old plain SIGIO signal */
 		case 0:
 			do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, type);
 	}
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index f6d1a3893f5a..2f9290f69610 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -710,7 +710,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 			}
 			if (n == 0)
 				break;
-		/* Branching from existing tree */
+		/* fall through - To branching from existing tree */
 		case ALLOC_GROW_DEPTH:
 			if (i > 1 && i < mp->mp_fheight)
 				gfs2_trans_add_meta(ip->i_gl, mp->mp_bh[i-1]);
@@ -721,7 +721,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 				state = ALLOC_DATA;
 			if (n == 0)
 				break;
-		/* Tree complete, adding data blocks */
+		/* fall through - To tree complete, adding data blocks */
 		case ALLOC_DATA:
 			BUG_ON(n > dblks);
 			BUG_ON(mp->mp_bh[end_of_metadata] == NULL);
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index eab04eca95a3..112d85849db1 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -340,6 +340,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
 			rdev = old_decode_dev(je16_to_cpu(jdev.old_id));
 		else
 			rdev = new_decode_dev(je32_to_cpu(jdev.new_id));
+		/* fall through */
 
 	case S_IFSOCK:
 	case S_IFIFO:
diff --git a/fs/libfs.c b/fs/libfs.c
index 0fb590d79f30..9efb647917e0 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -146,9 +146,11 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 		case 1:
 			offset += file->f_pos;
+			/* fall through */
 		case 0:
 			if (offset >= 0)
 				break;
+			/* fall through */
 		default:
 			return -EINVAL;
 	}
diff --git a/fs/locks.c b/fs/locks.c
index 71d0c6c2aac5..d7c05dde4ed8 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1476,7 +1476,7 @@ static void lease_clear_pending(struct file_lock *fl, int arg)
 	switch (arg) {
 	case F_UNLCK:
 		fl->fl_flags &= ~FL_UNLOCK_PENDING;
-		/* fall through: */
+		/* fall through */
 	case F_RDLCK:
 		fl->fl_flags &= ~FL_DOWNGRADE_PENDING;
 	}
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 0cfd257ffdaf..4680ad3bf55b 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -427,6 +427,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 				goto out;
 			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 			reclaim = true;
+			/* fall through */
 		case NFS4_OPEN_CLAIM_FH:
 		case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 			status = do_open_fhandle(rqstp, cstate, open);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index f056b1d3fecd..eca4a23f93c8 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2585,6 +2585,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		break;
 	default:				/* checked by xdr code */
 		WARN_ON_ONCE(1);
+		/* fall through */
 	case SP4_SSV:
 		status = nfserr_encr_alg_unsupp;
 		goto out_nolock;
diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c
index af2e7473956e..67dcee65fe50 100644
--- a/fs/ocfs2/cluster/quorum.c
+++ b/fs/ocfs2/cluster/quorum.c
@@ -81,6 +81,7 @@ static void o2quo_fence_self(void)
 	default:
 		WARN_ON(o2nm_single_cluster->cl_fence_method >=
 			O2NM_FENCE_METHODS);
+		/* fall through */
 	case O2NM_FENCE_RESET:
 		printk(KERN_ERR "*** ocfs2 is very sorry to be fencing this "
 		       "system by restarting ***\n");
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 1dea7a8a5255..abe27ec43176 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -317,6 +317,7 @@ loff_t seq_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 	case SEEK_CUR:
 		offset += file->f_pos;
+		/* fall through */
 	case SEEK_SET:
 		if (offset < 0)
 			break;
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 757afc7c5895..44b6845b071c 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -176,6 +176,7 @@ static ssize_t signalfd_dequeue(struct signalfd_ctx *ctx, kernel_siginfo_t *info
 		if (!nonblock)
 			break;
 		ret = -EAGAIN;
+		/* fall through */
 	default:
 		spin_unlock_irq(&current->sighand->siglock);
 		return ret;
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 7fd4802222b8..e1f1b2e868a7 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -42,7 +42,7 @@ ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 	case UFS_ST_SUNOS:
 		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
 			return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
-		/* Fall Through to UFS_ST_SUN */
+		/* Fall Through - to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
 	case UFS_ST_SUNx86:
@@ -63,7 +63,7 @@ ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
 			break;
 		}
-		/* Fall Through to UFS_ST_SUN */
+		/* Fall Through - to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
 		break;
diff --git a/lib/asn1_decoder.c b/lib/asn1_decoder.c
index dc14beae2c9a..8f3d207d2b00 100644
--- a/lib/asn1_decoder.c
+++ b/lib/asn1_decoder.c
@@ -385,6 +385,8 @@ next_op:
 	case ASN1_OP_END_SET_ACT:
 		if (unlikely(!(flags & FLAG_MATCHED)))
 			goto tag_mismatch;
+		/* fall through */
+
 	case ASN1_OP_END_SEQ:
 	case ASN1_OP_END_SET_OF:
 	case ASN1_OP_END_SEQ_OF:
@@ -450,6 +452,8 @@ next_op:
 			pc += asn1_op_lengths[op];
 			goto next_op;
 		}
+		/* fall through */
+
 	case ASN1_OP_ACT:
 		ret = actions[machine[pc + 1]](context, hdr, tag, data + tdp, len);
 		if (ret < 0)
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 171c19b6888e..dc59d6216318 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -135,18 +135,23 @@ unsigned long long memparse(const char *ptr, char **retptr)
 	case 'E':
 	case 'e':
 		ret <<= 10;
+		/* fall through */
 	case 'P':
 	case 'p':
 		ret <<= 10;
+		/* fall through */
 	case 'T':
 	case 't':
 		ret <<= 10;
+		/* fall through */
 	case 'G':
 	case 'g':
 		ret <<= 10;
+		/* fall through */
 	case 'M':
 	case 'm':
 		ret <<= 10;
+		/* fall through */
 	case 'K':
 	case 'k':
 		ret <<= 10;
diff --git a/lib/zstd/bitstream.h b/lib/zstd/bitstream.h
index a826b99e1d63..3a49784d5c61 100644
--- a/lib/zstd/bitstream.h
+++ b/lib/zstd/bitstream.h
@@ -259,10 +259,15 @@ ZSTD_STATIC size_t BIT_initDStream(BIT_DStream_t *bitD, const void *srcBuffer, s
 		bitD->bitContainer = *(const BYTE *)(bitD->start);
 		switch (srcSize) {
 		case 7: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[6]) << (sizeof(bitD->bitContainer) * 8 - 16);
+			/* fall through */
 		case 6: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[5]) << (sizeof(bitD->bitContainer) * 8 - 24);
+			/* fall through */
 		case 5: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[4]) << (sizeof(bitD->bitContainer) * 8 - 32);
+			/* fall through */
 		case 4: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[3]) << 24;
+			/* fall through */
 		case 3: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[2]) << 16;
+			/* fall through */
 		case 2: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[1]) << 8;
 		default:;
 		}
diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c
index f9166cf4f7a9..5e0b67003e55 100644
--- a/lib/zstd/compress.c
+++ b/lib/zstd/compress.c
@@ -3182,6 +3182,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream *zcs, void *dst, size_t *
 				zcs->outBuffFlushedSize = 0;
 				zcs->stage = zcss_flush; /* pass-through to flush stage */
 			}
+			/* fall through */
 
 		case zcss_flush: {
 			size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize;
diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c
index b17846725ca0..269ee9a796c1 100644
--- a/lib/zstd/decompress.c
+++ b/lib/zstd/decompress.c
@@ -1768,6 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c
 			return 0;
 		}
 		dctx->expected = 0; /* not necessary to copy more */
+		/* fall through */
 
 	case ZSTDds_decodeFrameHeader:
 		memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected);
@@ -2375,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 			}
 			zds->stage = zdss_read;
 		}
-		/* pass-through */
+		/* fall through */
 
 		case zdss_read: {
 			size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx);
@@ -2404,6 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 			zds->stage = zdss_load;
 			/* pass-through */
 		}
+		/* fall through */
 
 		case zdss_load: {
 			size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx);
@@ -2436,6 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 				/* pass-through */
 			}
 		}
+		/* fall through */
 
 		case zdss_flush: {
 			size_t const toFlushSize = zds->outEnd - zds->outStart;
diff --git a/lib/zstd/huf_compress.c b/lib/zstd/huf_compress.c
index 40055a7016e6..e727812d12aa 100644
--- a/lib/zstd/huf_compress.c
+++ b/lib/zstd/huf_compress.c
@@ -556,7 +556,9 @@ size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, si
 	n = srcSize & ~3; /* join to mod 4 */
 	switch (srcSize & 3) {
 	case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC);
+		/* fall through */
 	case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC);
+		/* fall through */
 	case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC);
 	case 0:
 	default:;