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| author | Guo Ren <guoren@linux.alibaba.com> | 2023-07-15 20:15:06 -0400 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-08-16 07:26:29 -0700 |
| commit | ebc9cb03b21e263db607a7604134a195aa314ebb (patch) | |
| tree | bf76de4765c47c2ee4dc7c89d6f2dc8272d72e68 /arch/riscv | |
| parent | 8d0be64154cf24660a947b84340e8d5bb1af855a (diff) | |
| download | linux-stable-ebc9cb03b21e263db607a7604134a195aa314ebb.tar.gz linux-stable-ebc9cb03b21e263db607a7604134a195aa314ebb.tar.bz2 linux-stable-ebc9cb03b21e263db607a7604134a195aa314ebb.zip | |
riscv: stack: Fixup independent softirq stack for CONFIG_FRAME_POINTER=n
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")
Cc: stable@vger.kernel.org
Reported-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Tested-by: Drew Fustini <dfustini@baylibre.com>
Link: https://lore.kernel.org/r/20230716001506.3506041-3-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/kernel/irq.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c index d0577cc6a081..a8efa053c4a5 100644 --- a/arch/riscv/kernel/irq.c +++ b/arch/riscv/kernel/irq.c @@ -84,6 +84,9 @@ void do_softirq_own_stack(void) : [sp] "r" (sp) : "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3", "t4", "t5", "t6", +#ifndef CONFIG_FRAME_POINTER + "s0", +#endif "memory"); } else #endif |