diff options
| author | Puranjay Mohan <puranjay@kernel.org> | 2024-06-18 14:58:20 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-25 09:49:19 +0200 |
| commit | e9ce9e0077c1ecc3eb618214aa713aee4bb93b79 (patch) | |
| tree | 6de894c3d56185421a6c3c55dc0f2b1df7beb9c2 | |
| parent | be3ba371437da22e6c6bab4a73824bf59cb68df5 (diff) | |
| download | linux-e9ce9e0077c1ecc3eb618214aa713aee4bb93b79.tar.gz linux-e9ce9e0077c1ecc3eb618214aa713aee4bb93b79.tar.bz2 linux-e9ce9e0077c1ecc3eb618214aa713aee4bb93b79.zip | |
riscv: stacktrace: fix usage of ftrace_graph_ret_addr()
[ Upstream commit 393da6cbb2ff89aadc47683a85269f913aa1c139 ]
ftrace_graph_ret_addr() takes an `idx` integer pointer that is used to
optimize the stack unwinding. Pass it a valid pointer to utilize the
optimizations that might be available in the future.
The commit is making riscv's usage of ftrace_graph_ret_addr() match
x86_64.
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20240618145820.62112-1-puranjay@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/riscv/kernel/stacktrace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/riscv/kernel/stacktrace.c b/arch/riscv/kernel/stacktrace.c index 0d3f00eb0bae..10e311b2759d 100644 --- a/arch/riscv/kernel/stacktrace.c +++ b/arch/riscv/kernel/stacktrace.c @@ -32,6 +32,7 @@ void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs, bool (*fn)(void *, unsigned long), void *arg) { unsigned long fp, sp, pc; + int graph_idx = 0; int level = 0; if (regs) { @@ -68,7 +69,7 @@ void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs, pc = regs->ra; } else { fp = frame->fp; - pc = ftrace_graph_ret_addr(current, NULL, frame->ra, + pc = ftrace_graph_ret_addr(current, &graph_idx, frame->ra, &frame->ra); if (pc == (unsigned long)ret_from_exception) { if (unlikely(!__kernel_text_address(pc) || !fn(arg, pc))) |