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| author | Dave Martin <Dave.Martin@arm.com> | 2019-07-02 14:07:28 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-07-22 11:44:08 +0100 |
| commit | f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac (patch) | |
| tree | 6838d2a529abca0a3286e442e4b316605fc84f03 /arch/arm64/kernel/perf_callchain.c | |
| parent | 8caa6e2be72313c170f2b30e8475323526dd7ed1 (diff) | |
| download | linux-f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac.tar.gz linux-f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac.tar.bz2 linux-f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac.zip | |
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/perf_callchain.c')
| -rw-r--r-- | arch/arm64/kernel/perf_callchain.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/arm64/kernel/perf_callchain.c b/arch/arm64/kernel/perf_callchain.c index 9d63514b9836..b0e03e052dd1 100644 --- a/arch/arm64/kernel/perf_callchain.c +++ b/arch/arm64/kernel/perf_callchain.c @@ -154,12 +154,7 @@ void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, return; } - frame.fp = regs->regs[29]; - frame.pc = regs->pc; -#ifdef CONFIG_FUNCTION_GRAPH_TRACER - frame.graph = 0; -#endif - + start_backtrace(&frame, regs->regs[29], regs->pc); walk_stackframe(current, &frame, callchain_trace, entry); } |