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riscv: traps: add missing prototype

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Sparse complains:
arch/riscv/kernel/traps.c:213:6: warning: symbol 'shadow_stack' was not declared. Should it be static?

The variable is used in entry.S, so declare shadow_stack there
alongside SHADOW_OVERFLOW_STACK_SIZE.

Fixes: 31da94c25a ("riscv: add VMAP_STACK overflow detection")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220814141237.493457-5-mail@conchuod.ie
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Conor Dooley 2022-08-14 15:12:38 +01:00 committed by Palmer Dabbelt
parent b5c3aca86d
commit d951b20b9d
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2 changed files with 4 additions and 1 deletions
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2
arch/riscv/include/asm/thread_info.h
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@ -42,6 +42,8 @@
#ifndef __ASSEMBLY__
extern long shadow_stack[SHADOW_OVERFLOW_STACK_SIZE / sizeof(long)];
#include <asm/processor.h>
#include <asm/csr.h>

3
arch/riscv/kernel/traps.c
View File

@ -20,9 +20,10 @@
#include <asm/asm-prototypes.h>
#include <asm/bug.h>
#include <asm/csr.h>
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/csr.h>
#include <asm/thread_info.h>
int show_unhandled_signals = 1;