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(parent: 30c8263) | patch
powerpc: Fix races with irq_work
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tue, 14 Jan 2014 06:11:39 +0000 (17:11 +1100)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 15 Jan 2014 02:59:03 +0000 (13:59 +1100)
commit0215f7d8c53fb192cd4491ede0ece5cca6b5db57
tree3c72b3f85caf97ec9a2d42367a32a06df5623e1atree | snapshot (tar.gz zip)
parent30c826358d10c1d6f8147de3310b97488daec830commit | diff
powerpc: Fix races with irq_work

If we set irq_work on a processor and immediately afterward, before the
irq work has a chance to be processed, we change the decrementer value,
we can seriously delay the handling of that irq_work.

Fix it by checking in a few places for pending irq work, first before
changing the decrementer in decrementer_set_next_event() and after
changing it in the same function and in timer_interrupt().

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/time.c diff | blob | blame | history