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| author | Conor Dooley <conor.dooley@microchip.com> | 2023-02-10 18:59:45 +0000 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-02-22 06:48:30 -0800 |
| commit | eb9be8310c58c166f9fae3b71c0ad9d6741b4897 (patch) | |
| tree | 8f65c2fe824d24381147aa51689608ed6e4d7698 /arch/riscv | |
| parent | a3c7d6b642e4b4619f220bf43e8b78c34ffaecf1 (diff) | |
| download | linux-eb9be8310c58c166f9fae3b71c0ad9d6741b4897.tar.gz linux-eb9be8310c58c166f9fae3b71c0ad9d6741b4897.tar.bz2 linux-eb9be8310c58c166f9fae3b71c0ad9d6741b4897.zip | |
RISC-V: add a spin_shadow_stack declaration
The patchwork automation reported a sparse complaint that
spin_shadow_stack was not declared and should be static:
../arch/riscv/kernel/traps.c:335:15: warning: symbol 'spin_shadow_stack' was not declared. Should it be static?
However, this is used in entry.S and therefore shouldn't be static.
The same applies to the shadow_stack that this pseudo spinlock is
trying to protect, so do like its charge and add a declaration to
thread_info.h
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Fixes: 7e1864332fbc ("riscv: fix race when vmap stack overflow")
Reviewed-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20230210185945.915806-1-conor@kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/include/asm/thread_info.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 67322f878e0d..f704c8dd57e0 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -43,6 +43,7 @@ #ifndef __ASSEMBLY__ extern long shadow_stack[SHADOW_OVERFLOW_STACK_SIZE / sizeof(long)]; +extern unsigned long spin_shadow_stack; #include <asm/processor.h> #include <asm/csr.h> |