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riscv: declare overflow_stack as exported from traps.c

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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 <ben.dooks@codethink.co.uk>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Fixes: be97d0db5f ("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 <palmer@rivosinc.com>
This commit is contained in:
Ben Dooks 2023-11-23 13:42:14 +00:00 committed by Palmer Dabbelt
parent ce68c03545
commit 2cf9637875
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1 changed files with 5 additions and 0 deletions
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5
arch/riscv/include/asm/stacktrace.h
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@ -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 */