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tile: ensure interrupts disabled for preempt_schedule_irq()

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When coming from a page fault (for example), interrupts might
be enabled as we enter the code to return from interrupt.

Cc: stable@vger.kernel.org
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf 2013-09-26 13:22:40 -04:00
parent dd386e03d9
commit 3f725c5b92
2 changed files with 6 additions and 0 deletions
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3
arch/tile/kernel/intvec_32.S
View file

@ -815,6 +815,9 @@ STD_ENTRY(interrupt_return)
}
bzt r28, 1f
bnz r29, 1f
/* Disable interrupts explicitly for preemption. */
IRQ_DISABLE(r20,r21)
TRACE_IRQS_OFF
jal preempt_schedule_irq
FEEDBACK_REENTER(interrupt_return)
1:

3
arch/tile/kernel/intvec_64.S
View file

@ -841,6 +841,9 @@ STD_ENTRY(interrupt_return)
}
beqzt r28, 1f
bnez r29, 1f
/* Disable interrupts explicitly for preemption. */
IRQ_DISABLE(r20,r21)
TRACE_IRQS_OFF
jal preempt_schedule_irq
FEEDBACK_REENTER(interrupt_return)
1: