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| author | Wang YanQing <udknight@gmail.com> | 2013-05-26 16:52:01 +0800 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-06-11 18:38:49 -0400 |
| commit | 238ae93d699d59876b470bf6455de22bcfaa9a1b (patch) | |
| tree | abd8e269b1c48ffcd4eb4e9120edd051f58202cd /kernel | |
| parent | 8092e808a31839c502a52d391b15f31c1d8764f5 (diff) | |
| download | talos-obmc-linux-238ae93d699d59876b470bf6455de22bcfaa9a1b.tar.gz talos-obmc-linux-238ae93d699d59876b470bf6455de22bcfaa9a1b.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 1a41023a1f88..5f4a09c12e0b 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5935,7 +5935,7 @@ init_tracer_debugfs(struct trace_array *tr, struct dentry *d_tracer) trace_create_file("buffer_total_size_kb", 0444, d_tracer, tr, &tracing_total_entries_fops); - trace_create_file("free_buffer", 0644, d_tracer, + trace_create_file("free_buffer", 0200, d_tracer, tr, &tracing_free_buffer_fops); trace_create_file("trace_marker", 0220, d_tracer, |
