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: [email protected] Signed-off-by: Chris Metcalf <[email protected]>
cluon · Sep 27, 2013 · 3f725c5 · 3f725c5
1 parent dd386e0
commit 3f725c5
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diff --git 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
@@ -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: