powerpc: Fix races with irq_work

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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>

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Benjamin Herrenschmidt 2014-01-14 17:11:39 +11:00

parent 30c826358d

commit 0215f7d8c5

1 changed files with 11 additions and 0 deletions

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arch/powerpc/kernel/time.c

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