Unverified Commit 8d0be641 authored by Guo Ren's avatar Guo Ren Committed by Palmer Dabbelt
Browse files

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: 163e76cc ("riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK")
Cc: stable@vger.kernel.org
Reported-by: default avatarZhangjin Wu <falcon@tinylab.org>
Signed-off-by: default avatarGuo Ren <guoren@linux.alibaba.com>
Signed-off-by: default avatarGuo Ren <guoren@kernel.org>
Tested-by: default avatarDrew Fustini <dfustini@baylibre.com>
Link: https://lore.kernel.org/r/20230716001506.3506041-2-guoren@kernel.org


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 79bc3f85

arch/riscv/kernel/traps.c

+3 −0
Original line number Diff line number Diff line
@@ -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