From a07b7b214240e1bf3de7067f2f43d88aa8e50c28 Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Tue, 7 Apr 2026 14:16:48 +0100 Subject: [PATCH] arm64: entry: Use irqentry_{enter_from,exit_to}_kernel_mode() The generic irqentry code now provides irqentry_enter_from_kernel_mode() and irqentry_exit_to_kernel_mode(), which can be used when an exception is known to be taken from kernel mode. These can be inlined into architecture-specific entry code, and avoid redundant work to test whether the exception was taken from user mode. Use these in arm64_enter_from_kernel_mode() and arm64_exit_to_kernel_mode(), which are only used for exceptions known to be taken from kernel mode. This will remove a small amount of redundant work, and will permit further changes to arm64_exit_to_kernel_mode() in subsequent patches. There should be no funcitonal change as a result of this patch. Signed-off-by: Mark Rutland Cc: Andy Lutomirski Cc: Jinjie Ruan Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Vladimir Murzin Cc: Will Deacon Reviewed-by: Jinjie Ruan Acked-by: Peter Zijlstra (Intel) Signed-off-by: Catalin Marinas --- arch/arm64/kernel/entry-common.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 3d01cdacdc7a..16a65987a6a9 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -39,7 +39,7 @@ static noinstr irqentry_state_t arm64_enter_from_kernel_mode(struct pt_regs *reg { irqentry_state_t state; - state = irqentry_enter(regs); + state = irqentry_enter_from_kernel_mode(regs); mte_check_tfsr_entry(); mte_disable_tco_entry(current); @@ -55,7 +55,7 @@ static void noinstr arm64_exit_to_kernel_mode(struct pt_regs *regs, irqentry_state_t state) { mte_check_tfsr_exit(); - irqentry_exit(regs, state); + irqentry_exit_to_kernel_mode(regs, state); } /*