2cf9637875
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>
30 lines
774 B
C
30 lines
774 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_RISCV_STACKTRACE_H
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#define _ASM_RISCV_STACKTRACE_H
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#include <linux/sched.h>
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#include <asm/ptrace.h>
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struct stackframe {
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unsigned long fp;
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unsigned long ra;
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};
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extern void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
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bool (*fn)(void *, unsigned long), void *arg);
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extern void dump_backtrace(struct pt_regs *regs, struct task_struct *task,
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const char *loglvl);
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static inline bool on_thread_stack(void)
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{
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return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
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}
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#ifdef CONFIG_VMAP_STACK
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DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack);
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#endif /* CONFIG_VMAP_STACK */
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#endif /* _ASM_RISCV_STACKTRACE_H */
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