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

(Cédric Le Goater review for aspeed_scu.c)

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
---
 hw/misc/a9scu.c            |  2 ++
 hw/misc/aspeed_scu.c       |  2 +-
 hw/misc/bcm2835_property.c | 12 ++++++------
 hw/misc/mos6522.c          |  4 ++--
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/hw/misc/a9scu.c b/hw/misc/a9scu.c
index a375ebc987..b422bec3c4 100644
--- a/hw/misc/a9scu.c
+++ b/hw/misc/a9scu.c
@@ -38,6 +38,7 @@ static uint64_t a9_scu_read(void *opaque, hwaddr offset,
     case 0x50: /* SCU Access Control Register */
     case 0x54: /* SCU Non-secure Access Control Register */
         /* unimplemented, fall through */
+        fallthrough;
     default:
         qemu_log_mask(LOG_UNIMP, "%s: Unsupported offset 0x%"HWADDR_PRIx"\n",
                       __func__, offset);
@@ -69,6 +70,7 @@ static void a9_scu_write(void *opaque, hwaddr offset,
     case 0x50: /* SCU Access Control Register */
     case 0x54: /* SCU Non-secure Access Control Register */
         /* unimplemented, fall through */
+        fallthrough;
     default:
         qemu_log_mask(LOG_UNIMP, "%s: Unsupported offset 0x%"HWADDR_PRIx
                                  " value 0x%"PRIx64"\n",
diff --git a/hw/misc/aspeed_scu.c b/hw/misc/aspeed_scu.c
index 8335364906..4a1ea2fa21 100644
--- a/hw/misc/aspeed_scu.c
+++ b/hw/misc/aspeed_scu.c
@@ -672,7 +672,7 @@ static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset,
         if (s->regs[reg + 2]) {
             return;
         }
-        /* fall through */
+        fallthrough;
     case AST2600_SYS_RST_CTRL:
     case AST2600_SYS_RST_CTRL2:
     case AST2600_CLK_STOP_CTRL:
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index 4ed9faa54a..98170f34a6 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -182,7 +182,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
             bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            /* fall through */
+            fallthrough;
         case RPI_FWREQ_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT:
             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
@@ -193,7 +193,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
             bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            /* fall through */
+            fallthrough;
         case RPI_FWREQ_FRAMEBUFFER_GET_VIRTUAL_WIDTH_HEIGHT:
             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
@@ -206,7 +206,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
             bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            /* fall through */
+            fallthrough;
         case RPI_FWREQ_FRAMEBUFFER_GET_DEPTH:
             stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
             resplen = 4;
@@ -218,7 +218,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
             bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            /* fall through */
+            fallthrough;
         case RPI_FWREQ_FRAMEBUFFER_GET_PIXEL_ORDER:
             stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
             resplen = 4;
@@ -230,7 +230,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
             bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            /* fall through */
+            fallthrough;
         case RPI_FWREQ_FRAMEBUFFER_GET_ALPHA_MODE:
             stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
             resplen = 4;
@@ -248,7 +248,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
             bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            /* fall through */
+            fallthrough;
         case RPI_FWREQ_FRAMEBUFFER_GET_VIRTUAL_OFFSET:
             stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
             stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
index d6ba47bde9..a62349e6a0 100644
--- a/hw/misc/mos6522.c
+++ b/hw/misc/mos6522.c
@@ -320,7 +320,7 @@ uint64_t mos6522_read(void *opaque, hwaddr addr, unsigned size)
         break;
     case VIA_REG_A:
        qemu_log_mask(LOG_UNIMP, "Read access to register A with handshake");
-       /* fall through */
+       fallthrough;
     case VIA_REG_ANH:
         val = s->a;
         ctrl = (s->pcr & CA2_CTRL_MASK) >> CA2_CTRL_SHIFT;
@@ -412,7 +412,7 @@ void mos6522_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
         break;
     case VIA_REG_A:
        qemu_log_mask(LOG_UNIMP, "Write access to register A with handshake");
-       /* fall through */
+       fallthrough;
     case VIA_REG_ANH:
         s->a = (s->a & ~s->dira) | (val & s->dira);
         mdc->portA_write(s);
-- 
2.39.2