[RFC PATCH v3 15/78] accel/tcg: add fallthrough pseudo-keyword

[Emmanouil Pitsidianakis]

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.pitsidiana...@linaro.org>
---
 accel/tcg/cputlb.c             | 4 ++--
 accel/tcg/ldst_atomicity.c.inc | 2 +-
 accel/tcg/plugin-gen.c         | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index b8c5e345b8..92b7ab529a 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -2244,7 +2244,7 @@ static uint64_t do_ld_beN(CPUState *cpu, 
MMULookupPageData *p,
                 return do_ld_whole_be8(cpu, ra, p, ret_be);
             }
         }
-        /* fall through */
+        fallthrough;
 
     case MO_ATOM_IFALIGN:
     case MO_ATOM_WITHIN16:
@@ -2664,7 +2664,7 @@ static uint64_t do_st_leN(CPUState *cpu, 
MMULookupPageData *p,
                 cpu_loop_exit_atomic(cpu, ra);
             }
         }
-        /* fall through */
+        fallthrough;
 
     case MO_ATOM_IFALIGN:
     case MO_ATOM_WITHIN16:
diff --git a/accel/tcg/ldst_atomicity.c.inc b/accel/tcg/ldst_atomicity.c.inc
index 1cf5b92166..3752f74214 100644
--- a/accel/tcg/ldst_atomicity.c.inc
+++ b/accel/tcg/ldst_atomicity.c.inc
@@ -41,7 +41,7 @@ static int required_atomicity(CPUState *cpu, uintptr_t p, 
MemOp memop)
 
     case MO_ATOM_IFALIGN_PAIR:
         size = half;
-        /* fall through */
+        fallthrough;
 
     case MO_ATOM_IFALIGN:
         tmp = (1 << size) - 1;
diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
index d31c9993ea..ba9a8c8789 100644
--- a/accel/tcg/plugin-gen.c
+++ b/accel/tcg/plugin-gen.c
@@ -190,7 +190,7 @@ static void plugin_gen_empty_callback(enum plugin_gen_from 
from)
          */
         gen_wrapped(from, PLUGIN_GEN_ENABLE_MEM_HELPER,
                     gen_empty_mem_helper);
-        /* fall through */
+        fallthrough;
     case PLUGIN_GEN_FROM_TB:
         gen_wrapped(from, PLUGIN_GEN_CB_UDATA, gen_empty_udata_cb);
         gen_wrapped(from, PLUGIN_GEN_CB_INLINE, gen_empty_inline_cb);
-- 
2.39.2