[PATCH 08/23] ARM: entry: no need to check parent IRQ mask in IRQ handler return
From: Russell King - ARM Linux <hidden>
Date: 2011-06-29 09:21:34
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
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 <redacted> --- arch/arm/kernel/entry-armv.S | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 1e5f387..fd42e66 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S@@ -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 )
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1.7.4.4