ring-buffer: Remove obsolete rb_event_is_commit()

Commit a389d86f7fd0 ("ring-buffer: Have nested events still record running
time stamp") removed the only uses of rb_event_is_commit() in
rb_update_event() and rb_update_write_stamp().

Hence, since then, make CC=clang W=1 warns:

  kernel/trace/ring_buffer.c:2763:1:
    warning: unused function 'rb_event_is_commit' [-Wunused-function]

Remove this obsolete function.

Link: https://lkml.kernel.org/r/20201117053703.11275-1-lukas.bulwahn@gmail.com
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 7cd888ee9ac74947a4e1653fcbf04d0e46ac7fb1..1b9da155ff00c867d3ec4963a17910b454c48e0f 100644 (file)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -2629,9 +2629,6 @@ rb_add_time_stamp(struct ring_buffer_event *event, u64 delta, bool abs)
        return skip_time_extend(event);
 }
 
-static inline bool rb_event_is_commit(struct ring_buffer_per_cpu *cpu_buffer,
-                                    struct ring_buffer_event *event);
-
 #ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
 static inline bool sched_clock_stable(void)
 {
@@ -2759,20 +2756,6 @@ static unsigned rb_calculate_event_length(unsigned length)
        return length;
 }
 
-static __always_inline bool
-rb_event_is_commit(struct ring_buffer_per_cpu *cpu_buffer,
-                  struct ring_buffer_event *event)
-{
-       unsigned long addr = (unsigned long)event;
-       unsigned long index;
-
-       index = rb_event_index(event);
-       addr &= PAGE_MASK;
-
-       return cpu_buffer->commit_page->page == (void *)addr &&
-               rb_commit_index(cpu_buffer) == index;
-}
-
 static u64 rb_time_delta(struct ring_buffer_event *event)
 {
        switch (event->type_len) {