linux-kernel - Re: v2.6.31-7381-g7fa0772: new build warnings: kmemcheck, _

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Message-ID: <84144f020909230021h76400174q4bb6c9bcd39d576b@mail.gmail.com>
Date:	Wed, 23 Sep 2009 10:21:34 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	linux-kernel@...r.kernel.org,
	Vegard Nossum <vegard.nossum@...il.com>,
	Eric B Munson <ebmunson@...ibm.com>,
	Johannes Berg <johannes@...solutions.net>,
	Dave Airlie <airlied@...ux.ie>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: v2.6.31-7381-g7fa0772: new build warnings: kmemcheck, 
	__deprecated, hugetlb, radeon

On Wed, Sep 23, 2009 at 10:19 AM, Jean Delvare <khali@...ux-fr.org> wrote:
> Hi Stefan,
>
> On Tue, 22 Sep 2009 18:34:16 +0200, Stefan Richter wrote:
>> Latest git compiles with extreme noise:
>>
>> In file included from include/net/inet_connection_sock.h:23,
>>                   from include/linux/tcp.h:178,
>>                   from include/linux/ipv6.h:215,
>>                   from include/net/ipv6.h:16,
>>                   from include/linux/sunrpc/clnt.h:25,
>>                   from include/linux/nfs_fs.h:52,
>>                   from kernel/sysctl.c:48:
>> include/net/inet_sock.h: In function 'inet_reqsk_alloc':
>> include/net/inet_sock.h:208: warning: ISO C90 forbids mixed declarations
>> and code
>>
>> Vegard, this is obviously caused by commit
>> 45e3ff82708c65c895d5c5882aff17ecf62a80b5.
>
> Actually not, it's caused by commit
> 181f7c5dd3832763bdf2756b6d2d8a49bdf12791
> (kmemcheck: add missing braces to do-while in kmemcheck_annotate_bitfield)
>
> And the fix would be:
>
> From: Jean Delvare <khali@...ux-fr.org>
> Subject: Fix build warning in kmemcheck_annotate_bitfield
>
> Fix the following build warning:
>
> include/net/inet_sock.h: In function 'inet_reqsk_alloc':
> include/net/inet_sock.h:208: warning: ISO C90 forbids mixed declarations
> and code
>
> Signed-off-by: Jean Delvare <khali@...ux-fr.org>
> Cc: Johannes Berg <johannes@...solutions.net>
> Cc: Signed-off-by: Vegard Nossum <vegard.nossum@...il.com>
> ---
>  include/linux/kmemcheck.h |    4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> --- linux-2.6.32-pre.orig/include/linux/kmemcheck.h     2009-09-23 08:19:34.000000000 +0200
> +++ linux-2.6.32-pre/include/linux/kmemcheck.h  2009-09-23 09:05:30.000000000 +0200
> @@ -145,10 +145,12 @@ static inline bool kmemcheck_is_obj_init
>
>  #define kmemcheck_annotate_bitfield(ptr, name)                         \
>        do {                                                            \
> +               int _n;                                                 \
> +                                                                       \
>                if (!ptr)                                               \
>                        break;                                          \
>                                                                        \
> -               int _n = (long) &((ptr)->name##_end)                    \
> +               _n = (long) &((ptr)->name##_end)                        \
>                        - (long) &((ptr)->name##_begin);                \
>                BUILD_BUG_ON(_n < 0);                                   \
>                                                                        \

Oh, I was looking at an old version. The fix looks good to me, thanks Jean!

Acked-by: Pekka Enberg <penberg@...helsinki.fi>
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