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Fix: update v4l2 instrumentation to 3.15 kernel
[lttng-modules.git]
/
lib
/
ringbuffer
/
frontend_api.h
diff --git
a/lib/ringbuffer/frontend_api.h
b/lib/ringbuffer/frontend_api.h
index 13975602380bf02e82979c071969be0eaa56612a..31ccbfad020c5a1afa1b8570f1e6be0dd28438fa 100644
(file)
--- a/
lib/ringbuffer/frontend_api.h
+++ b/
lib/ringbuffer/frontend_api.h
@@
-125,6
+125,14
@@
int lib_ring_buffer_try_reserve(const struct lib_ring_buffer_config *config,
* boundary. It's safe to write.
*/
*o_end = *o_begin + ctx->slot_size;
* boundary. It's safe to write.
*/
*o_end = *o_begin + ctx->slot_size;
+
+ if (unlikely((subbuf_offset(*o_end, chan)) == 0))
+ /*
+ * The offset_end will fall at the very beginning of the next
+ * subbuffer.
+ */
+ return 1;
+
return 0;
}
return 0;
}
@@
-284,7
+292,7
@@
void lib_ring_buffer_commit(const struct lib_ring_buffer_config *config,
commit_count = v_read(config, &buf->commit_hot[endidx].cc);
lib_ring_buffer_check_deliver(config, buf, chan, offset_end - 1,
commit_count = v_read(config, &buf->commit_hot[endidx].cc);
lib_ring_buffer_check_deliver(config, buf, chan, offset_end - 1,
- commit_count, endidx);
+ commit_count, endidx
, ctx->tsc
);
/*
* Update used size at each commit. It's needed only for extracting
* ring_buffer buffers from vmcore, after crash.
/*
* Update used size at each commit. It's needed only for extracting
* ring_buffer buffers from vmcore, after crash.
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