[RFC PATCH v3 08/78] hw/block: add fallthrough pseudo-keyword

[Emmanouil Pitsidianakis <manos.pitsidianakis@xxxxxxxxxx>]

In preparation of raising -Wimplicit-fallthrough to 5, replace all
fall-through comments with the fallthrough attribute pseudo-keyword.

Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidianakis@xxxxxxxxxx>
---
 hw/block/dataplane/xen-block.c | 4 ++--
 hw/block/m25p80.c              | 2 +-
 hw/block/onenand.c             | 2 +-
 hw/block/pflash_cfi01.c        | 1 +
 hw/block/pflash_cfi02.c        | 6 ++++--
 5 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/hw/block/dataplane/xen-block.c b/hw/block/dataplane/xen-block.c
index 3b6f2b0aa2..1ae25a73b2 100644
--- a/hw/block/dataplane/xen-block.c
+++ b/hw/block/dataplane/xen-block.c
@@ -159,7 +159,7 @@ static int xen_block_parse_request(XenBlockRequest *request)
         if (!request->req.nr_segments) {
             return 0;
         }
-        /* fall through */
+        fallthrough;
     case BLKIF_OP_WRITE:
         break;
     case BLKIF_OP_DISCARD:
@@ -299,7 +299,7 @@ static void xen_block_complete_aio(void *opaque, int ret)
         if (!request->req.nr_segments) {
             break;
         }
-        /* fall through */
+        fallthrough;
     case BLKIF_OP_READ:
         if (request->status == BLKIF_RSP_OKAY) {
             block_acct_done(blk_get_stats(dataplane->blk), &request->acct);
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index afc3fdf4d6..523c34da71 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -1462,7 +1462,7 @@ static void decode_new_cmd(Flash *s, uint32_t value)
             s->state = STATE_COLLECTING_DATA;
             break;
         }
-        /* Fallthrough */
+        fallthrough;
 
     default:
         s->pos = 0;
diff --git a/hw/block/onenand.c b/hw/block/onenand.c
index 50d3d1c985..87583c48a0 100644
--- a/hw/block/onenand.c
+++ b/hw/block/onenand.c
@@ -564,7 +564,7 @@ static void onenand_command(OneNANDState *s)
         break;
     case 0x95:  /* Multi-block erase */
         qemu_irq_pulse(s->intr);
-        /* Fall through.  */
+        fallthrough;
     case 0x94:  /* Block erase */
         sec = ((s->addr[ONEN_BUF_BLOCK] & 0xfff) |
                         (s->addr[ONEN_BUF_BLOCK] >> 15 ? s->density_mask : 0))
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index 62056b1d74..cb58f08f53 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -276,6 +276,7 @@ static uint32_t pflash_read(PFlashCFI01 *pfl, hwaddr offset,
          */
         pfl->cmd = 0x00;
         /* fall through to read code */
+        fallthrough;
     case 0x00: /* This model reset value for READ_ARRAY (not CFI compliant) */
         /* Flash area read */
         ret = pflash_data_read(pfl, offset, width, be);
diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index 2a99b286b0..711f978d7c 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -328,6 +328,7 @@ static uint64_t pflash_read(void *opaque, hwaddr offset, 
unsigned int width)
         trace_pflash_read_unknown_state(pfl->name, pfl->cmd);
         pflash_reset_state_machine(pfl);
         /* fall through to the read code */
+        fallthrough;
     case 0x80: /* Erase (unlock) */
         /* We accept reads during second unlock sequence... */
     case 0x00:
@@ -359,6 +360,7 @@ static uint64_t pflash_read(void *opaque, hwaddr offset, 
unsigned int width)
                 break;
             }
             /* Fall through to data read. */
+            fallthrough;
         default:
             ret = pflash_data_read(pfl, offset, width);
         }
@@ -368,7 +370,7 @@ static uint64_t pflash_read(void *opaque, hwaddr offset, 
unsigned int width)
     case 0x30: /* Sector Erase */
         /* Toggle bit 2 during erase, but not program. */
         toggle_dq2(pfl);
-        /* fall through */
+        fallthrough;
     case 0xA0: /* Program */
         /* Toggle bit 6 */
         toggle_dq6(pfl);
@@ -582,7 +584,7 @@ static void pflash_write(void *opaque, hwaddr offset, 
uint64_t value,
                 pfl->cmd = 0x98;
                 return;
             }
-            /* fall through */
+            fallthrough;
         default:
             trace_pflash_write_invalid(pfl->name, pfl->cmd);
             goto reset_flash;
-- 
2.39.2