From 8d0be64154cf24660a947b84340e8d5bb1af855a Mon Sep 17 00:00:00 2001 From: Guo Ren Date: Sat, 15 Jul 2023 20:15:05 -0400 Subject: riscv: stack: Fixup independent irq stack for CONFIG_FRAME_POINTER=n The independent irq stack uses s0 to save & restore sp, but s0 would be corrupted when CONFIG_FRAME_POINTER=n. So add s0 in the clobber list to fix the problem. Fixes: 163e76cc6ef4 ("riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK") Cc: stable@vger.kernel.org Reported-by: Zhangjin Wu Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Drew Fustini Link: https://lore.kernel.org/r/20230716001506.3506041-2-guoren@kernel.org Signed-off-by: Palmer Dabbelt --- arch/riscv/kernel/traps.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch') diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 729f79c97e2b..f798c853bede 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -372,6 +372,9 @@ asmlinkage void noinstr do_irq(struct pt_regs *regs) : [sp] "r" (sp), [regs] "r" (regs) : "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3", "t4", "t5", "t6", +#ifndef CONFIG_FRAME_POINTER + "s0", +#endif "memory"); } else #endif -- cgit