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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-06-25 11:44:06 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-07-02 10:56:00 +0100
commit02fe2845d6a837ab02f0738f6cf4591a02cc88d4 (patch)
treee50d06a1ab73a2735dd145edde458463b1da4a37 /arch/arm/mm/fault.c
parent8b4186160b7894ca4583f702a562856d5d9e9118 (diff)
ARM: entry: avoid enabling interrupts in prefetch/data abort handlers
Avoid enabling interrupts if the parent context had interrupts enabled in the abort handler assembly code, and move this into the breakpoint/ page/alignment fault handlers instead. This gets rid of some special-casing for the breakpoint fault handlers from the low level abort handler path. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/fault.c')
-rw-r--r--arch/arm/mm/fault.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index bc0e1d88fd3b..20e5d5120609 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -285,6 +285,10 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
tsk = current;
mm = tsk->mm;
+ /* Enable interrupts if they were enabled in the parent context. */
+ if (interrupts_enabled(regs))
+ local_irq_enable();
+
/*
* If we're in an interrupt or have no user
* context, we must not take the fault..