From: Oleg Nesterov <oleg@redhat.com>
Date: Tue, 23 Jul 2013 15:26:06 +0000 (+0200)
Subject: tracing: Change tracing_entries_fops to rely on tracing_get_cpu()
X-Git-Tag: v3.11-rc3~2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0bc392ee46d0fd8e6b678457ef71f074f19a03c5;p=pandora-kernel.git

tracing: Change tracing_entries_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 its last user, tracing_entries_fops, to use
   tracing_*_generic_tr() instead.

2. Change debugfs_create_file("buffer_size_kb", data) callers
   to pass "data = tr".

3. Change tracing_entries_read() and tracing_entries_write() to
   use tracing_get_cpu().

4. Kill the no longer used tracing_open_generic_tc() and
   tracing_release_generic_tc().

Link: http://lkml.kernel.org/r/20130723152606.GA23730@redhat.com

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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