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authorChris Metcalf <cmetcalf@tilera.com>2013-09-26 13:22:40 -0400
committerChris Metcalf <cmetcalf@tilera.com>2013-09-27 16:09:43 -0400
commit3f725c5b924e14eb00c58892d21d92100121e5ce (patch)
tree6813269f85403d60b14d40406c3eeed1ac885c27
parentdd386e03d9753889dc3ea3eed91ad3729df08819 (diff)
downloadlinux-3f725c5b924e14eb00c58892d21d92100121e5ce.tar.bz2
tile: ensure interrupts disabled for preempt_schedule_irq()
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>
-rw-r--r--arch/tile/kernel/intvec_32.S3
-rw-r--r--arch/tile/kernel/intvec_64.S3
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S
index 088d5c141e68..2cbe6d5dd6b0 100644
--- a/arch/tile/kernel/intvec_32.S
+++ b/arch/tile/kernel/intvec_32.S
@@ -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:
diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S
index ec755d3f3734..b8fc497f2437 100644
--- a/arch/tile/kernel/intvec_64.S
+++ b/arch/tile/kernel/intvec_64.S
@@ -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: