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Date: Mon, 18 Feb 2019 08:08:11 -0800 From: Guenter Roeck <linux@...ck-us.net> To: "Gustavo A. R. Silva" <gustavo@...eddedor.com>, Wim Van Sebroeck <wim@...ux-watchdog.org> Cc: linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org> Subject: Re: [PATCH] watchdog: smsc37b787_wdt: Mark expected switch fall-through On 2/14/19 12:16 PM, Gustavo A. R. Silva wrote: > In preparation to enabling -Wimplicit-fallthrough, mark switch > cases where we are expecting to fall through. > > This patch fixes the following warning: > > drivers/watchdog/smsc37b787_wdt.c: In function ‘wb_smsc_wdt_ioctl’: > drivers/watchdog/smsc37b787_wdt.c:480:3: warning: this statement may fall through [-Wimplicit-fallthrough=] > wb_smsc_wdt_set_timeout(timeout); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/watchdog/smsc37b787_wdt.c:482:2: note: here > case WDIOC_GETTIMEOUT: > ^~~~ > > Warning level 3 was used: -Wimplicit-fallthrough=3 > > Notice that, in this particular case, the code comment is modified > in accordance with what GCC is expecting to find. > > This patch is part of the ongoing efforts to enable > -Wimplicit-fallthrough. > > Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com> Reviewed-by: Guenter Roeck <linux@...ck-us.net> > --- > drivers/watchdog/smsc37b787_wdt.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/watchdog/smsc37b787_wdt.c b/drivers/watchdog/smsc37b787_wdt.c > index 445ea1ad1fa9..c768dcd53034 100644 > --- a/drivers/watchdog/smsc37b787_wdt.c > +++ b/drivers/watchdog/smsc37b787_wdt.c > @@ -478,7 +478,7 @@ static long wb_smsc_wdt_ioctl(struct file *file, > return -EINVAL; > timeout = new_timeout; > wb_smsc_wdt_set_timeout(timeout); > - /* fall through and return the new timeout... */ > + /* fall through - and return the new timeout... */ > case WDIOC_GETTIMEOUT: > new_timeout = timeout; > if (unit == UNIT_MINUTE) >
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