tracing: Change tracing_stats_fops to rely on tracing_get_cpu()
authorOleg Nesterov <oleg@redhat.com>
Tue, 23 Jul 2013 15:26:03 +0000 (17:26 +0200)
committerSteven Rostedt <rostedt@rostedt.homelinux.com>
Wed, 24 Jul 2013 15:22:52 +0000 (11:22 -0400)
commit4d3435b8a4c3357695e09c5e7a3bf73a19fca5b0
tree6f9032ea0dd88228e864fbfdfd29bba08f80f9e8
parent46ef2be0d1d5ccea0c41bb606143586daadd537c
tracing: Change tracing_stats_fops to rely on tracing_get_cpu()

tracing_open_generic_tc() is racy, the memory inode->i_private
points to can be already freed.

1. Change one of its users, tracing_stats_fops, to use
   tracing_*_generic_tr() instead.

2. Change trace_create_cpu_file("stats", data) to pass "data = tr".

3. Change tracing_stats_read() to use tracing_get_cpu().

Link: http://lkml.kernel.org/r/20130723152603.GA23727@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace.c