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| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-09-28 13:39:38 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-10-21 12:37:52 +0200 |
| commit | fa76ee6fea9ceae2dde9b04c08994ebb8acf9156 (patch) | |
| tree | 5c63a3aaff70cb53411e424a37e9ed48cceb3047 /include | |
| parent | 7bf3c4d84204b9edb43114a6028841443bbed49d (diff) | |
| download | linux-fa76ee6fea9ceae2dde9b04c08994ebb8acf9156.tar.gz linux-fa76ee6fea9ceae2dde9b04c08994ebb8acf9156.tar.bz2 linux-fa76ee6fea9ceae2dde9b04c08994ebb8acf9156.zip | |
ring-buffer: Add ring_buffer_wake_waiters()
commit 7e9fbbb1b776d8d7969551565bc246f74ec53b27 upstream.
On closing of a file that represents a ring buffer or flushing the file,
there may be waiters on the ring buffer that needs to be woken up and exit
the ring_buffer_wait() function.
Add ring_buffer_wake_waiters() to wake up the waiters on the ring buffer
and allow them to exit the wait loop.
Link: https://lkml.kernel.org/r/20220928133938.28dc2c27@gandalf.local.home
Cc: stable@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: 15693458c4bc0 ("tracing/ring-buffer: Move poll wake ups into ring buffer code")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ring_buffer.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h index dac53fd3afea..2504df9a0453 100644 --- a/include/linux/ring_buffer.h +++ b/include/linux/ring_buffer.h @@ -101,7 +101,7 @@ __ring_buffer_alloc(unsigned long size, unsigned flags, struct lock_class_key *k int ring_buffer_wait(struct trace_buffer *buffer, int cpu, int full); __poll_t ring_buffer_poll_wait(struct trace_buffer *buffer, int cpu, struct file *filp, poll_table *poll_table); - +void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu); #define RING_BUFFER_ALL_CPUS -1 |