tracing: A few more fixes

Oleg is working on fixing a very tight race between opening a event file and deleting that event at the same time (both must be done as root).

I also found a bug while testing Oleg's patches which has to do with a race with kprobes using the function tracer.

There's also a deadlock fix that was introduced with the previous fixes.

git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
for-next

Head SHA1: 592795bd4c750beccb3babba856960880e621d42

Oleg Nesterov (7):
tracing: Introduce trace_create_cpu_file() and tracing_get_cpu()
tracing: Change tracing_pipe_fops() to rely on tracing_get_cpu()
tracing: Change tracing_buffers_fops to rely on tracing_get_cpu()
tracing: Change tracing_stats_fops to rely on tracing_get_cpu()
tracing: Change tracing_entries_fops to rely on tracing_get_cpu()
tracing: Change tracing_fops/snapshot_fops to rely on tracing_get_cpu()
tracing: Kill trace_cpu struct/members

Steven Rostedt (Red Hat) (2):
ftrace: Add check for NULL regs if ops has SAVE_REGS set
tracing: Remove locking trace_types_lock from tracing_reset_all_online_cpus()

----

 kernel/trace/ftrace.c |   18 ++++-
 kernel/trace/trace.c  |  197 ++++++++++++++++++++-----------------------------
 kernel/trace/trace.h  |    8 --
 3 files changed, 95 insertions(+), 128 deletions(-)