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| author |   Oleg Nesterov <oleg@redhat.com> | 2013-07-26 19:25:32 +0200 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2013-07-29 22:04:30 -0400 |
| commit | 1a11126bcb7c93c289bf3218fa546fd3b0c0df8b (patch) | |
| tree | ffbfb4e73894c00bf674ece92c2531505a877a1b /kernel/trace/trace_kprobe.c | |
| parent | Linux 3.11-rc3 (diff) | |
| download | linux-dev-1a11126bcb7c93c289bf3218fa546fd3b0c0df8b.tar.xz linux-dev-1a11126bcb7c93c289bf3218fa546fd3b0c0df8b.zip | |
tracing: Turn event/id->i_private into call->event.type
event_id_read() is racy, ftrace_event_call can be already freed
by trace_remove_event_call() callers.
Change event_create_dir() to pass "data = call->event.type", this
is all event_id_read() needs. ftrace_event_id_fops no longer needs
tracing_open_generic().
We add the new helper, event_file_data(), to read ->i_private, it
will have more users.
Note: currently ACCESS_ONCE() and "id != 0" check are not needed,
but we are going to change event_remove/rmdir to clear ->i_private.
Link: http://lkml.kernel.org/r/20130726172532.GA3605@redhat.com
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
0 files changed, 0 insertions, 0 deletions