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arm64: remove redundant local_daif_mask() in bad_mode()

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Upon taking an exception, the CPU sets all the DAIF bits. We never
clear any of these bits prior to calling bad_mode(), and bad_mode()
itself never clears any of these bits, so there's no need to call
local_daif_mask().

This patch removes the redundant call.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210607094624.34689-2-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Rutland
2021-06-07 10:46:05 +01:00
committed by Will Deacon
parent c4681547bc
commit 382dcdd66c
1 changed files with 0 additions and 1 deletions
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arch/arm64/kernel/traps.c
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@ -765,7 +765,6 @@ asmlinkage void notrace bad_mode(struct pt_regs *regs, int reason, unsigned int
esr_get_class_string(esr));
__show_regs(regs);
local_daif_mask();
panic("bad mode");
}