[PATCH 3/9] accel/tcg/user-exec: silence the compiler warnings

[Chen Qun]

When using -Wimplicit-fallthrough in our CFLAGS, the compiler showed warning:
../accel/tcg/user-exec.c: In function ‘handle_cpu_signal’:
../accel/tcg/user-exec.c:169:13: warning: this statement may fall through 
[-Wimplicit-fallthrough=]
  169 |             cpu_exit_tb_from_sighandler(cpu, old_set);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../accel/tcg/user-exec.c:172:9: note: here
  172 |         default:

This exception branch fall through the 'default' branch and run the 
'g_assert_not_reached' statement.
So we could use "fall through" instead of "NORETURN" here.

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
---
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
---
 accel/tcg/user-exec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 4ebe25461a..330468e990 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -167,7 +167,7 @@ static inline int handle_cpu_signal(uintptr_t pc, siginfo_t 
*info,
              */
             clear_helper_retaddr();
             cpu_exit_tb_from_sighandler(cpu, old_set);
-            /* NORETURN */
+            /* fall through */
 
         default:
             g_assert_not_reached();
-- 
2.27.0