diff options
| author | Andy Chiu <andybnac@gmail.com> | 2025-04-08 02:08:28 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@dabbelt.com> | 2025-06-05 11:09:24 -0700 |
| commit | 500e626c4a5bf2fa7cc6f1cd6dd86c77b5b127f2 (patch) | |
| tree | 6010bc71870f8e0ad59579c2dcb0bd37802bcc19 /kernel/trace | |
| parent | c41bf4326c7b0af3f7004235ac91551833ec95c6 (diff) | |
kernel: ftrace: export ftrace_sync_ipi
The following ftrace patch for riscv uses a data store to update ftrace
function. Therefore, a romote fence is required to order it against
function_trace_op updates. The mechanism is similar to the fence between
function_trace_op and update_ftrace_func in the generic ftrace, so we
leverage the same ftrace_sync_ipi function.
[ alex: Fix build warning when !CONFIG_DYNAMIC_FTRACE ]
Signed-off-by: Andy Chiu <andybnac@gmail.com>
Link: https://lore.kernel.org/r/20250407180838.42877-4-andybnac@gmail.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 61130bb34d6c..31e9fe3bf964 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -188,7 +188,7 @@ static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip, op->saved_func(ip, parent_ip, op, fregs); } -static void ftrace_sync_ipi(void *data) +void ftrace_sync_ipi(void *data) { /* Probably not needed, but do it anyway */ smp_rmb(); |