[PATCH] nios2: signal: Mark expected switch fall-through

["Gustavo A. R. Silva" <gustavoars@kernel.org>]

Mark switch cases where we are expecting to fall through.

Fix the following warning through the use of the new the new
pseudo-keyword fallthrough;

arch/nios2/kernel/signal.c:254:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
  254 |    restart = -2;
      |    ~~~~~~~~^~~~
arch/nios2/kernel/signal.c:255:3: note: here
  255 |   case ERESTARTNOHAND:
      |   ^~~~

Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 arch/nios2/kernel/signal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c
index a42dd09c65783..d8a087cf2b424 100644
--- a/arch/nios2/kernel/signal.c
+++ b/arch/nios2/kernel/signal.c
@@ -252,6 +252,7 @@ static int do_signal(struct pt_regs *regs)
 		switch (retval) {
 		case ERESTART_RESTARTBLOCK:
 			restart = -2;
+			fallthrough;
 		case ERESTARTNOHAND:
 		case ERESTARTSYS:
 		case ERESTARTNOINTR:
-- 
2.27.0