Messages in this thread | | | Date | Mon, 1 Mar 2021 15:15:26 +0100 | From | Greg KH <> | Subject | Re: [PATCH 4.9.y 1/1] futex: Fix OWNER_DEAD fixup |
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On Tue, Feb 23, 2021 at 10:41:51PM +0800, Zheng Yejian wrote: > From: Peter Zijlstra <peterz@infradead.org> > > commit a97cb0e7b3f4c6297fd857055ae8e895f402f501 upstream. > > Both Geert and DaveJ reported that the recent futex commit: > > c1e2f0eaf015 ("futex: Avoid violating the 10th rule of futex") > > introduced a problem with setting OWNER_DEAD. We set the bit on an > uninitialized variable and then entirely optimize it away as a > dead-store. > > Move the setting of the bit to where it is more useful. > > Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> > Reported-by: Dave Jones <davej@codemonkey.org.uk> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Paul E. McKenney <paulmck@us.ibm.com> > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Fixes: c1e2f0eaf015 ("futex: Avoid violating the 10th rule of futex") > Link: http://lkml.kernel.org/r/20180122103947.GD2228@hirez.programming.kicks-ass.net > Signed-off-by: Ingo Molnar <mingo@kernel.org> > Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com> > --- > kernel/futex.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-)
Now queued up, thanks.
greg k-h
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