linux-kernel - [PATCH] ARM: signal: Mark expected switch fall-through

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Message-ID: <20190729001314.GA24747@embeddedor>
Date:   Sun, 28 Jul 2019 19:13:14 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Russell King <linux@...linux.org.uk>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH] ARM: signal: Mark expected switch fall-through

Mark switch cases where we are expecting to fall through.

This patch fixes the following warning:

arch/arm/kernel/signal.c: In function 'do_signal':
arch/arm/kernel/signal.c:598:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
    restart -= 2;
    ~~~~~~~~^~~~
arch/arm/kernel/signal.c:599:3: note: here
   case -ERESTARTNOHAND:
   ^~~~

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 arch/arm/kernel/signal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 09f6fdd41974..ab2568996ddb 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -596,6 +596,7 @@ static int do_signal(struct pt_regs *regs, int syscall)
 		switch (retval) {
 		case -ERESTART_RESTARTBLOCK:
 			restart -= 2;
+			/* Fall through */
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
-- 
2.22.0