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Date: Mon, 18 Feb 2019 08:08:42 -0800 From: Guenter Roeck <linux@...ck-us.net> To: "Gustavo A. R. Silva" <gustavo@...eddedor.com>, Zwane Mwaikambo <zwanem@...il.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: sc1200: Mark expected switch fall-through On 2/14/19 12:20 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/sc1200wdt.c: In function ‘sc1200wdt_ioctl’: > drivers/watchdog/sc1200wdt.c:241:3: warning: this statement may fall through [-Wimplicit-fallthrough=] > sc1200wdt_write_data(WDTO, timeout); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/watchdog/sc1200wdt.c:244:2: 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/sc1200wdt.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/watchdog/sc1200wdt.c b/drivers/watchdog/sc1200wdt.c > index 8e4e2fc13f87..e035a4d4b299 100644 > --- a/drivers/watchdog/sc1200wdt.c > +++ b/drivers/watchdog/sc1200wdt.c > @@ -239,7 +239,7 @@ static long sc1200wdt_ioctl(struct file *file, unsigned int cmd, > return -EINVAL; > timeout = new_timeout; > sc1200wdt_write_data(WDTO, timeout); > - /* fall through and return the new timeout */ > + /* fall through - and return the new timeout */ > > case WDIOC_GETTIMEOUT: > return put_user(timeout * 60, p); >
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