diff options
| author | Zong Li <zong.li@sifive.com> | 2019-12-23 16:46:13 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-09 10:19:02 +0100 |
| commit | ac8e28a9b2ffa4667bfe1b1d2712d0bb8954bee8 (patch) | |
| tree | d47b9b900c848784729a78dcd353bc60a995d57d /arch/riscv | |
| parent | 316a9a84dbaf628b74d30fd3e1a5dac739e125ed (diff) | |
| download | linux-stable-ac8e28a9b2ffa4667bfe1b1d2712d0bb8954bee8.tar.gz linux-stable-ac8e28a9b2ffa4667bfe1b1d2712d0bb8954bee8.tar.bz2 linux-stable-ac8e28a9b2ffa4667bfe1b1d2712d0bb8954bee8.zip | |
riscv: ftrace: correct the condition logic in function graph tracer
commit 1d8f65798240b6577d8c44d20c8ea8f1d429e495 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/riscv')
| -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 a840b7d074f7..6d39f64e4dce 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; } |