Commit 88f502fe authored Mar 13, 2009 by Ingo Molnar

futex: remove the pointer math from double_unlock_hb, fix



Impact: fix double unlock crash

Thomas Gleixner noticed that the simplified double_unlock_hb()
became ... too unsophisticated: in the hb1 == hb2 case it will
do a double unlock.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Darren Hart <dvhltc@us.ibm.com>
LKML-Reference: <20090312221118.11146.68610.stgit@Aeon>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent f061d351

kernel/futex.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -659,6 +659,7 @@ static inline void
		double_unlock_hb(struct futex_hash_bucket hb1, struct futex_hash_bucket hb2)
		{
		spin_unlock(&hb1->lock);
		if (hb1 != hb2)
		spin_unlock(&hb2->lock);
		}