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ARM: entry: no need to check parent IRQ mask in IRQ handler return 

There's no point checking to see whether IRQs were masked in the parent
context when returning from IRQ handling - the fact that we're handling
an IRQ means that the parent context must have had IRQs unmasked.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
hifive-unleashed-5.1
Russell King 2011-06-25 16:57:50 +01:00
parent 1613cc1119
commit fbab1c8094
1 changed files with 3 additions and 2 deletions
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5
arch/arm/kernel/entry-armv.S
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@ -234,8 +234,9 @@ __irq_svc:
#endif
ldr r4, [sp, #S_PSR] @ irqs are already disabled
#ifdef CONFIG_TRACE_IRQFLAGS
tst r4, #PSR_I_BIT
bleq trace_hardirqs_on
@ The parent context IRQs must have been enabled to get here in
@ the first place, so there's no point checking the PSR I bit.
bl trace_hardirqs_on
#endif
svc_exit r4 @ return from exception
UNWIND(.fnend )