netdev - Re: [PATCH] drivers/net/wireless/ath/wil6210: Makefile, only -Werror when no -W* in EXTRA

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Message-ID: <1921426.IqHmmMU5eP@lx-vladimir>
Date:	Wed, 27 Feb 2013 11:46:37 +0200
From:	Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>
To:	Chen Gang <gang.chen@...anux.com>
CC:	"John W. Linville" <linville@...driver.com>,
	<linux-wireless@...r.kernel.org>, <wil6210@....qualcomm.com>,
	"netdev@...r.kernel.org >> netdev" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drivers/net/wireless/ath/wil6210: Makefile, only -Werror when no -W* in EXTRA_CFLAGS

On Wednesday, February 27, 2013 04:56:57 PM Chen Gang wrote:
> 于 2013年02月27日 16:45, Vladimir Kondratiev 写道:
> > On Wednesday, February 27, 2013 02:55:06 PM Chen Gang wrote:
> >>
> >>   When make with EXTRA_CFLAGS=-W, it will report error.
> >>   so give a check in Makefile.
> >>
> >> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> >> ---
> >>  drivers/net/wireless/ath/wil6210/Makefile |    4 +++-
> >>  1 files changed, 3 insertions(+), 1 deletions(-)
> >>
> >> diff --git a/drivers/net/wireless/ath/wil6210/Makefile b/drivers/net/wireless/ath/wil6210/Makefile
> >> index 9396dc9..d288eea 100644
> >> --- a/drivers/net/wireless/ath/wil6210/Makefile
> >> +++ b/drivers/net/wireless/ath/wil6210/Makefile
> >> @@ -9,5 +9,7 @@ wil6210-objs += wmi.o
> >>  wil6210-objs += interrupt.o
> >>  wil6210-objs += txrx.o
> >>  
> >> -subdir-ccflags-y += -Werror
> >> +ifeq (, $(findstring -W,$(EXTRA_CFLAGS)))
> >> +	subdir-ccflags-y += -Werror
> >> +endif
> >>  subdir-ccflags-y += -D__CHECK_ENDIAN__
> >>
> > Acked-by: Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>
> > 
> > Well, agree; -W triggers lots of warnings, I suspect all other places that use
> > -Werror should be problematic. Worth fixing all others? Quick look for v3.8 raises:
> > 
> 
>   thank you for your suggestion.
>   after this patch applied, I will do for others (let you as signed-of-by, too).

Perhaps, it would be good idea to fight the original problem.

I mean, fix warnings where possible. Example: there are lots of
"unused parameter" ones. Where it is false warning, add __maybe_unused
attribute. Like this:

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index c566927..83e43b7 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -163,8 +163,9 @@ extern int _cond_resched(void);
 # define might_sleep() \
        do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
 #else
-  static inline void __might_sleep(const char *file, int line,
-                                  int preempt_offset) { }
+  static inline void __might_sleep(const char *file __maybe_unused,
+                                  int line __maybe_unused,
+                                  int preempt_offset __maybe_unused) { }
 # define might_sleep() do { might_resched(); } while (0)
 #endif
 

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