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arm64: Make some stacktrace functions private

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Now that open-coded stack unwinds have been converted to
arch_stack_walk(), we no longer need to expose any of unwind_frame(),
walk_stackframe(), or start_backtrace() outside of stacktrace.c.

Make those functions private to stacktrace.c, removing their prototypes
from <asm/stacktrace.h> and marking them static.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: Madhavan T. Venkataraman <madvenka@linux.microsoft.com>
Link: https://lore.kernel.org/r/20211129142849.3056714-10-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Rutland 2021-11-29 14:28:49 +00:00 committed by Catalin Marinas
parent 2dad6dc17b
commit d2d1d2645c
2 changed files with 7 additions and 11 deletions
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6
arch/arm64/include/asm/stacktrace.h
View File

@ -63,9 +63,6 @@ struct stackframe {
#endif
};
extern int unwind_frame(struct task_struct *tsk, struct stackframe *frame);
extern void walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
bool (*fn)(void *, unsigned long), void *data);
extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
const char *loglvl);
@ -150,7 +147,4 @@ static inline bool on_accessible_stack(const struct task_struct *tsk,
return false;
}
void start_backtrace(struct stackframe *frame, unsigned long fp,
unsigned long pc);
#endif /* __ASM_STACKTRACE_H */

12
arch/arm64/kernel/stacktrace.c
View File

@ -33,8 +33,8 @@
*/
void start_backtrace(struct stackframe *frame, unsigned long fp,
unsigned long pc)
static void start_backtrace(struct stackframe *frame, unsigned long fp,
unsigned long pc)
{
frame->fp = fp;
frame->pc = pc;
@ -63,7 +63,8 @@ void start_backtrace(struct stackframe *frame, unsigned long fp,
* records (e.g. a cycle), determined based on the location and fp value of A
* and the location (but not the fp value) of B.
*/
int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
static int notrace unwind_frame(struct task_struct *tsk,
struct stackframe *frame)
{
unsigned long fp = frame->fp;
struct stack_info info;
@ -141,8 +142,9 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
}
NOKPROBE_SYMBOL(unwind_frame);
void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
bool (*fn)(void *, unsigned long), void *data)
static void notrace walk_stackframe(struct task_struct *tsk,
struct stackframe *frame,
bool (*fn)(void *, unsigned long), void *data)
{
while (1) {
int ret;