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* [PATCH] watchdog: alim7101: Mark expected switch fall-through
@ 2019-03-20 18:16 Gustavo A. R. Silva
  2019-03-21  0:12 ` Guenter Roeck
  0 siblings, 1 reply; 6+ messages in thread
From: Gustavo A. R. Silva @ 2019-03-20 18:16 UTC (permalink / raw)
  To: Wim Van Sebroeck, Guenter Roeck
  Cc: linux-watchdog, linux-kernel, Gustavo A. R. Silva, Kees Cook

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/watchdog/alim7101_wdt.c: In function ‘fop_ioctl’:
drivers/watchdog/alim7101_wdt.c:279:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   wdt_keepalive();
   ^~~~~~~~~~~~~~~
drivers/watchdog/alim7101_wdt.c:282:2: note: here
  case WDIOC_GETTIMEOUT:
  ^~~~

Notice that, in this particular case, the /* Fall through */
comment is placed at the very bottom of the case statement,
which is what GCC is expecting to find.

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 drivers/watchdog/alim7101_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/alim7101_wdt.c b/drivers/watchdog/alim7101_wdt.c
index 12f7ea62dddd..f5ada07e9202 100644
--- a/drivers/watchdog/alim7101_wdt.c
+++ b/drivers/watchdog/alim7101_wdt.c
@@ -277,8 +277,8 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			return -EINVAL;
 		timeout = new_timeout;
 		wdt_keepalive();
-		/* Fall through */
 	}
+		/* Fall through */
 	case WDIOC_GETTIMEOUT:
 		return put_user(timeout, p);
 	default:
-- 
2.21.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2019-04-05 21:41 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-03-20 18:16 [PATCH] watchdog: alim7101: Mark expected switch fall-through Gustavo A. R. Silva
2019-03-21  0:12 ` Guenter Roeck
2019-03-21  0:15   ` Gustavo A. R. Silva
2019-04-05 18:04     ` Gustavo A. R. Silva
2019-04-05 20:55       ` Guenter Roeck
2019-04-05 21:41         ` Gustavo A. R. Silva

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