From eb9be8310c58c166f9fae3b71c0ad9d6741b4897 Mon Sep 17 00:00:00 2001 From: Conor Dooley Date: Fri, 10 Feb 2023 18:59:45 +0000 Subject: [PATCH] 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 Fixes: 7e1864332fbc ("riscv: fix race when vmap stack overflow") Reviewed-by: Guo Ren Link: https://lore.kernel.org/r/20230210185945.915806-1-conor@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/thread_info.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 67322f878e0d7..f704c8dd57e04 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 #include -- 2.30.2