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| author | Zong Li <zong.li@sifive.com> | 2019-12-23 16:46:13 +0800 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2020-01-03 00:56:37 -0800 |
| commit | 1d8f65798240b6577d8c44d20c8ea8f1d429e495 (patch) | |
| tree | 3d83f684825cbaebff1a71c225970e226768442d | |
| parent | cfda8617e22a8bf217a613d0b3ba3a38778443ba (diff) | |
| download | linux-stable-1d8f65798240b6577d8c44d20c8ea8f1d429e495.tar.gz linux-stable-1d8f65798240b6577d8c44d20c8ea8f1d429e495.tar.bz2 linux-stable-1d8f65798240b6577d8c44d20c8ea8f1d429e495.zip | |
riscv: ftrace: correct the condition logic in function graph tracer
The condition should be logical NOT to assign the hook address to parent
address. Because the return value 0 of function_graph_enter upon
success.
Fixes: e949b6db51dc (riscv/function_graph: Simplify with function_graph_enter())
Signed-off-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
| -rw-r--r-- | arch/riscv/kernel/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c index b94d8db5ddcc..c40fdcdeb950 100644 --- a/arch/riscv/kernel/ftrace.c +++ b/arch/riscv/kernel/ftrace.c @@ -142,7 +142,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, */ old = *parent; - if (function_graph_enter(old, self_addr, frame_pointer, parent)) + if (!function_graph_enter(old, self_addr, frame_pointer, parent)) *parent = return_hooker; } |