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| author | Dave Martin <Dave.Martin@arm.com> | 2019-07-02 16:07:28 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-07-22 13:44:08 +0300 |
| commit | f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac (patch) | |
| tree | 6838d2a529abca0a3286e442e4b316605fc84f03 /arch/arm64/kernel/process.c | |
| parent | 8caa6e2be72313c170f2b30e8475323526dd7ed1 (diff) | |
| download | linux-f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac.tar.xz | |
arm64: stacktrace: Factor out backtrace initialisation
Some common code is required by each stacktrace user to initialise
struct stackframe before the first call to unwind_frame().
In preparation for adding to the common code, this patch factors it
out into a separate function start_backtrace(), and modifies the
stacktrace callers appropriately.
No functional change.
Signed-off-by: Dave Martin <dave.martin@arm.com>
[Mark: drop tsk argument, update more callsites]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/process.c')
| -rw-r--r-- | arch/arm64/kernel/process.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 6a869d9f304f..8d836d0abc96 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -498,11 +498,8 @@ unsigned long get_wchan(struct task_struct *p) if (!stack_page) return 0; - frame.fp = thread_saved_fp(p); - frame.pc = thread_saved_pc(p); -#ifdef CONFIG_FUNCTION_GRAPH_TRACER - frame.graph = 0; -#endif + start_backtrace(&frame, thread_saved_fp(p), thread_saved_pc(p)); + do { if (unwind_frame(p, &frame)) goto out; |