lkml.org 
[lkml]   [2018]   [Apr]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] tick-sched: avoid a maybe-uninitialized warning
On Mon, Apr 9, 2018 at 6:18 PM, Ingo Molnar <mingo@kernel.org> wrote:
>
> * Arnd Bergmann <arnd@arndb.de> wrote:
>
>> The use of bitfields seems to confuse gcc, leading to a false-positive
>> warning in all compiler versions:
>>
>> kernel/time/tick-sched.c: In function 'tick_nohz_idle_exit':
>> kernel/time/tick-sched.c:538:2: error: 'now' may be used uninitialized in this function [-Werror=maybe-uninitialized]
>>
>> This introduces a temporary variable to track the flags so gcc
>> doesn't have to evaluate twice, eliminating the code path that
>> leads to the warning.
>>
>> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85301
>> Fixes: 1cae544d42d2 ("nohz: Gather tick_sched booleans under a common flag field")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>
> Which tree is this against? There's no such commit either in -tip, upstream or in
> -next AFAICS.

It's in today's linux-next. I found that it came in through Rafael's
pm/linux-next tree.

Arnd

\
 
 \ /
  Last update: 2018-04-09 19:54    [W:0.047 / U:0.400 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site