X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Fconfig.h;h=d48654bf1ceecf3f42bb4361437ef78d1dbe9d01;hb=71c5729c47c806cda99a2afa8073fe699d8849d2;hp=63189b950faa68fa4e5e348c41f1aba55dcdc098;hpb=c075712b6e6ba766c844f4504ac012c49d1f6b4b;p=lttng-modules.git

diff --git a/lib/ringbuffer/config.h b/lib/ringbuffer/config.h
index 63189b95..d48654bf 100644
--- a/lib/ringbuffer/config.h
+++ b/lib/ringbuffer/config.h
@@ -1,29 +1,16 @@
-#ifndef _LIB_RING_BUFFER_CONFIG_H
-#define _LIB_RING_BUFFER_CONFIG_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+ *
  * lib/ringbuffer/config.h
  *
  * Ring buffer configuration header. Note: after declaring the standard inline
  * functions, clients should also include linux/ringbuffer/api.h.
  *
  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#ifndef _LIB_RING_BUFFER_CONFIG_H
+#define _LIB_RING_BUFFER_CONFIG_H
+
 #include <linux/types.h>
 #include <linux/percpu.h>
 #include <lib/align.h>
@@ -48,7 +35,8 @@ struct lib_ring_buffer_client_cb {
 	size_t (*record_header_size) (const struct lib_ring_buffer_config *config,
 				      struct channel *chan, size_t offset,
 				      size_t *pre_header_padding,
-				      struct lib_ring_buffer_ctx *ctx);
+				      struct lib_ring_buffer_ctx *ctx,
+				      void *client_ctx);
 
 	/* Slow path only, at subbuffer switch */
 	size_t (*subbuffer_header_size) (void);
@@ -200,6 +188,8 @@ struct lib_ring_buffer_ctx {
 					 */
 	u64 tsc;			/* time-stamp counter value */
 	unsigned int rflags;		/* reservation flags */
+	/* Cache backend pages pointer chasing. */
+	struct lib_ring_buffer_backend_pages *backend_pages;
 };
 
 /**
@@ -223,6 +213,7 @@ void lib_ring_buffer_ctx_init(struct lib_ring_buffer_ctx *ctx,
 	ctx->largest_align = largest_align;
 	ctx->cpu = cpu;
 	ctx->rflags = 0;
+	ctx->backend_pages = NULL;
 }
 
 /*