diff options
| author | Mao Han <han_mao@c-sky.com> | 2019-08-29 14:57:00 +0800 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2019-09-04 12:43:00 -0700 |
| commit | dbeb90b0c1eb86a9b963b929d3c937afb7dadfa3 (patch) | |
| tree | 75c68accfe0d5c2cefacd0ce511e6efdbbecd196 /arch/riscv/kernel/stacktrace.c | |
| parent | 909548d6c5789dbd6cd4c7a6b32fcf0ae974f5ee (diff) | |
riscv: Add perf callchain support
This patch add support for perf callchain sampling on riscv platforms.
The return address of leaf function is retrieved from pt_regs as
it is not saved in the outmost frame.
Signed-off-by: Mao Han <han_mao@c-sky.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: linux-riscv <linux-riscv@lists.infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Guo Ren <guoren@kernel.org>
Tested-by: Greentime Hu <greentime.hu@sifive.com>
[paul.walmsley@sifive.com: fixed some 'checkpatch.pl --strict' issues;
fixed patch description spelling]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'arch/riscv/kernel/stacktrace.c')
| -rw-r--r-- | arch/riscv/kernel/stacktrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/riscv/kernel/stacktrace.c b/arch/riscv/kernel/stacktrace.c index f15642715d1a..0940681d2f68 100644 --- a/arch/riscv/kernel/stacktrace.c +++ b/arch/riscv/kernel/stacktrace.c @@ -19,8 +19,8 @@ struct stackframe { unsigned long ra; }; -static void notrace walk_stackframe(struct task_struct *task, - struct pt_regs *regs, bool (*fn)(unsigned long, void *), void *arg) +void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs, + bool (*fn)(unsigned long, void *), void *arg) { unsigned long fp, sp, pc; |