tracing: Fix file mode of free_buffer
authorWang YanQing <udknight@gmail.com>
Sun, 26 May 2013 08:52:01 +0000 (16:52 +0800)
committerSteven Rostedt <rostedt@goodmis.org>
Tue, 11 Jun 2013 22:38:49 +0000 (18:38 -0400)
commit238ae93d699d59876b470bf6455de22bcfaa9a1b
treeabd8e269b1c48ffcd4eb4e9120edd051f58202cd
parent8092e808a31839c502a52d391b15f31c1d8764f5
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>
kernel/trace/trace.c