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arm64: irqflags: Pass flags as readonly operand to restore instruction

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Flags are only read by the instructions doing the irqflags restore
operation. Pass the operand as read only to the asm inline instead of
read-write.

Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Mark Rutland <mark.rutland@ar.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Julien Thierry 2019-06-11 10:38:07 +01:00 committed by Catalin Marinas
parent 9034f62515
commit 19c36b185a
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/irqflags.h
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@ -119,8 +119,8 @@ static inline void arch_local_irq_restore(unsigned long flags)
__msr_s(SYS_ICC_PMR_EL1, "%0")
"dsb sy",
ARM64_HAS_IRQ_PRIO_MASKING)
: "+r" (flags)
:
: "r" (flags)
: "memory");
}