From: Wang YanQing <udknight@gmail.com>
Date: Sun, 26 May 2013 08:52:01 +0000 (+0800)
Subject: tracing: Fix file mode of free_buffer
X-Git-Tag: v3.11-rc1~33^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=238ae93d699d59876b470bf6455de22bcfaa9a1b;p=pandora-kernel.git

tracing: Fix file mode of free_buffer

Commit 4f271a2a60c748599b30bb4dafff30d770439b96
(tracing: Add a proc file to stop tracing and free buffer)
implement a method to free up ring buffer in kernel memory
in the release code path of free_buffer's fd.

Then we don't need read/write support for free_buffer,
indeed we just have a dummy write fop, and don't implement read fop.

So the 0200 is more reasonable file mode for free_buffer than
the current file mode 0644.

Link: http://lkml.kernel.org/r/20130526085201.GA3183@udknight

Acked-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
Acked-by: David Sharp <dhsharp@google.com>
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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