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    Subject[PATCH 5.16 0854/1039] tracing: Have syscall trace events use trace_event_buffer_lock_reserve()
    Date
    From: Steven Rostedt <rostedt@goodmis.org>

    commit 3e2a56e6f639492311e0a8533f0a7aed60816308 upstream.

    Currently, the syscall trace events call trace_buffer_lock_reserve()
    directly, which means that it misses out on some of the filtering
    optimizations provided by the helper function
    trace_event_buffer_lock_reserve(). Have the syscall trace events call that
    instead, as it was missed when adding the update to use the temp buffer
    when filtering.

    Link: https://lkml.kernel.org/r/20220107225839.823118570@goodmis.org

    Cc: stable@vger.kernel.org
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Tom Zanussi <zanussi@kernel.org>
    Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
    Fixes: 0fc1b09ff1ff4 ("tracing: Use temp buffer when filtering events")
    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    kernel/trace/trace_syscalls.c | 6 ++----
    1 file changed, 2 insertions(+), 4 deletions(-)

    --- a/kernel/trace/trace_syscalls.c
    +++ b/kernel/trace/trace_syscalls.c
    @@ -323,8 +323,7 @@ static void ftrace_syscall_enter(void *d

    trace_ctx = tracing_gen_ctx();

    - buffer = tr->array_buffer.buffer;
    - event = trace_buffer_lock_reserve(buffer,
    + event = trace_event_buffer_lock_reserve(&buffer, trace_file,
    sys_data->enter_event->event.type, size, trace_ctx);
    if (!event)
    return;
    @@ -367,8 +366,7 @@ static void ftrace_syscall_exit(void *da

    trace_ctx = tracing_gen_ctx();

    - buffer = tr->array_buffer.buffer;
    - event = trace_buffer_lock_reserve(buffer,
    + event = trace_event_buffer_lock_reserve(&buffer, trace_file,
    sys_data->exit_event->event.type, sizeof(*entry),
    trace_ctx);
    if (!event)

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