From: Guo Ren guoren@linux.alibaba.com
The independent softirq 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: dd69d07a5a6c ("riscv: stack: Support HAVE_SOFTIRQ_ON_OWN_STACK") Reported-by: Zhangjin Wu falcon@tinylab.org Signed-off-by: Guo Ren guoren@linux.alibaba.com Signed-off-by: Guo Ren guoren@kernel.org --- arch/riscv/kernel/irq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c index d0577cc6a081..0b58720109db 100644 --- a/arch/riscv/kernel/irq.c +++ b/arch/riscv/kernel/irq.c @@ -83,7 +83,7 @@ void do_softirq_own_stack(void) : : [sp] "r" (sp) : "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", - "t0", "t1", "t2", "t3", "t4", "t5", "t6", + "t0", "t1", "t2", "t3", "t4", "t5", "t6", "s0", "memory"); } else #endif