From 89b00dc3d6bb2aa493be2f0f9824051e471c5a92 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Thu, 23 Nov 2023 13:42:14 +0000 Subject: [PATCH] riscv: declare overflow_stack as exported from traps.c [ Upstream commit 2cf963787529f615f7c93bdcf13a5e82029e7f38 ] The percpu area overflow_stacks is exported from arch/riscv/kernel/traps.c for use in the entry code, but is not declared anywhere. Add the relevant declaration to arch/riscv/include/asm/stacktrace.h to silence the following sparse warning: arch/riscv/kernel/traps.c:395:1: warning: symbol '__pcpu_scope_overflow_stack' was not declared. Should it be static? We don't add the stackinfo_get_overflow() call as for some of the other architectures as this doesn't seem to be used yet, so just silence the warning. Signed-off-by: Ben Dooks Reviewed-by: Conor Dooley Fixes: be97d0db5f44 ("riscv: VMAP_STACK overflow detection thread-safe") Link: https://lore.kernel.org/r/20231123134214.81481-1-ben.dooks@codethink.co.uk Signed-off-by: Palmer Dabbelt Signed-off-by: Sasha Levin --- arch/riscv/include/asm/stacktrace.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/riscv/include/asm/stacktrace.h b/arch/riscv/include/asm/stacktrace.h index f7e8ef2..b1495a7 100644 --- a/arch/riscv/include/asm/stacktrace.h +++ b/arch/riscv/include/asm/stacktrace.h @@ -21,4 +21,9 @@ static inline bool on_thread_stack(void) return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1)); } + +#ifdef CONFIG_VMAP_STACK +DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack); +#endif /* CONFIG_VMAP_STACK */ + #endif /* _ASM_RISCV_STACKTRACE_H */ -- 2.7.4