[PATCH v4 01/20] arm64: remove redundant local_daif_mask() in bad_mode()
From: Mark Rutland <mark.rutland@arm.com>
Date: 2021-06-07 10:03:44
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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> --- arch/arm64/kernel/traps.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index a05d34f0e82a..41f0aa92022a 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c@@ -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"); }
--
2.11.0
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