X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Ffrontend_api.h;h=a6f2c6f4f16742a4b35dafaeafcc25eaa13e1a61;hb=620971f9806e90c0805f766e0e56e95bffa20613;hp=b622bd7e865cae4079a4a91c2bab87eed34ebb32;hpb=e6b06d7d6346a5e3cfcdd214d171af067bca0f34;p=lttng-modules.git

diff --git a/lib/ringbuffer/frontend_api.h b/lib/ringbuffer/frontend_api.h
index b622bd7e..a6f2c6f4 100644
--- a/lib/ringbuffer/frontend_api.h
+++ b/lib/ringbuffer/frontend_api.h
@@ -29,8 +29,8 @@
  * See linux/ringbuffer/frontend.h for channel allocation and read-side API.
  */
 
-#include "../../wrapper/ringbuffer/frontend.h"
-#include "../../wrapper/percpu-defs.h"
+#include <wrapper/ringbuffer/frontend.h>
+#include <wrapper/percpu-defs.h>
 #include <linux/errno.h>
 #include <linux/prefetch.h>
 
@@ -162,14 +162,14 @@ int lib_ring_buffer_reserve(const struct lib_ring_buffer_config *config,
 	unsigned long o_begin, o_end, o_old;
 	size_t before_hdr_pad = 0;
 
-	if (atomic_read(&chan->record_disabled))
+	if (unlikely(atomic_read(&chan->record_disabled)))
 		return -EAGAIN;
 
 	if (config->alloc == RING_BUFFER_ALLOC_PER_CPU)
 		buf = per_cpu_ptr(chan->backend.buf, ctx->cpu);
 	else
 		buf = chan->backend.buf;
-	if (atomic_read(&buf->record_disabled))
+	if (unlikely(atomic_read(&buf->record_disabled)))
 		return -EAGAIN;
 	ctx->buf = buf;
 
@@ -250,6 +250,7 @@ void lib_ring_buffer_commit(const struct lib_ring_buffer_config *config,
 	unsigned long offset_end = ctx->buf_offset;
 	unsigned long endidx = subbuf_index(offset_end - 1, chan);
 	unsigned long commit_count;
+	struct commit_counters_hot *cc_hot = &buf->commit_hot[endidx];
 
 	/*
 	 * Must count record before incrementing the commit count.
@@ -270,7 +271,7 @@ void lib_ring_buffer_commit(const struct lib_ring_buffer_config *config,
 	} else
 		smp_wmb();
 
-	v_add(config, ctx->slot_size, &buf->commit_hot[endidx].cc);
+	v_add(config, ctx->slot_size, &cc_hot->cc);
 
 	/*
 	 * commit count read can race with concurrent OOO commit count updates.
@@ -290,7 +291,7 @@ void lib_ring_buffer_commit(const struct lib_ring_buffer_config *config,
 	 *   count reaches back the reserve offset for a specific sub-buffer,
 	 *   which is completely independent of the order.
 	 */
-	commit_count = v_read(config, &buf->commit_hot[endidx].cc);
+	commit_count = v_read(config, &cc_hot->cc);
 
 	lib_ring_buffer_check_deliver(config, buf, chan, offset_end - 1,
 				      commit_count, endidx, ctx->tsc);
@@ -298,8 +299,8 @@ void lib_ring_buffer_commit(const struct lib_ring_buffer_config *config,
 	 * Update used size at each commit. It's needed only for extracting
 	 * ring_buffer buffers from vmcore, after crash.
 	 */
-	lib_ring_buffer_write_commit_counter(config, buf, chan, endidx,
-			offset_end, commit_count);
+	lib_ring_buffer_write_commit_counter(config, buf, chan,
+			offset_end, commit_count, cc_hot);
 }
 
 /**