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Diffstat (limited to 'include/linux/ring_buffer.h')
-rw-r--r--include/linux/ring_buffer.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index fa802db216f9..dc5ae4e96aee 100644
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h
@@ -98,7 +98,9 @@ __ring_buffer_alloc(unsigned long size, unsigned flags, struct lock_class_key *k
__ring_buffer_alloc((size), (flags), &__key); \
})
-int ring_buffer_wait(struct trace_buffer *buffer, int cpu, int full);
+typedef bool (*ring_buffer_cond_fn)(void *data);
+int ring_buffer_wait(struct trace_buffer *buffer, int cpu, int full,
+ ring_buffer_cond_fn cond, void *data);
__poll_t ring_buffer_poll_wait(struct trace_buffer *buffer, int cpu,
struct file *filp, poll_table *poll_table, int full);
void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu);