On Monday, April 9, 2018 7:53:30 PM CEST Arnd Bergmann wrote: > On Mon, Apr 9, 2018 at 6:18 PM, Ingo Molnar <mi...@kernel.org> wrote: > > > > * Arnd Bergmann <a...@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 <a...@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.
That's the idle loop rework series. I'll add this patch on top of that if there are no objections. Thanks, Rafael