 @@ -1,239 +1,239 @@
-/*	$NetBSD: linux_idr.c,v 1.1.2.5 2013/07/24 02:51:35 riastradh Exp $	*/
+/*	$NetBSD: linux_idr.c,v 1.1.2.6 2013/07/24 03:16:15 riastradh Exp $	*/
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Taylor R. Campbell.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_idr.c,v 1.1.2.5 2013/07/24 02:51:35 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_idr.c,v 1.1.2.6 2013/07/24 03:16:15 riastradh Exp $");
 #include <sys/param.h>
 #include <sys/atomic.h>
 #include <sys/kmem.h>
 #include <sys/rbtree.h>
 #include <linux/err.h>
 #include <linux/idr.h>
 struct idr_node {
 	rb_node_t in_rb_node;
 	int in_index;
 	void *in_data;
 };
 static signed int idr_tree_compare_nodes(void *, const void *, const void *);
 static signed int idr_tree_compare_key(void *, const void *, const void *);
 static const rb_tree_ops_t idr_rb_ops = {
 	.rbto_compare_nodes = &idr_tree_compare_nodes,
 	.rbto_compare_key = &idr_tree_compare_key,
 	.rbto_node_offset = offsetof(struct idr_node, in_rb_node),
 	.rbto_context = NULL,
 };
 static signed int
 idr_tree_compare_nodes(void *ctx __unused, const void *na, const void *nb)
+{
 	const int a = ((const struct idr_node *)na)->in_index;
 	const int b = ((const struct idr_node *)nb)->in_index;
 	if (a < b)
 		return -1;
 	else if (b < a)
 		 return +1;
 	else
 		return 0;
+}
 static signed int
 idr_tree_compare_key(void *ctx __unused, const void *n, const void *key)
+{
 	const int a = ((const struct idr_node *)n)->in_index;
 	const int b = *(const int *)key;
 	if (a < b)
 		return -1;
 	else if (b < a)
 		return +1;
 	else
 		return 0;
+}
 void
 idr_init(struct idr *idr)
+{
 	rw_init(&idr->idr_lock);
 	rb_tree_init(&idr->idr_tree, &idr_rb_ops);
 	idr->idr_temp = NULL;
+}
 void
 idr_destroy(struct idr *idr)
+{
 	if (idr->idr_temp != NULL) {
 		/* XXX Probably shouldn't happen.  */
 		kmem_free(idr->idr_temp, sizeof(*idr->idr_temp));
 		idr->idr_temp = NULL;
+	}
 #if 0				/* XXX No rb_tree_destroy?  */
 	rb_tree_destroy(&idr->idr_tree);
 #endif
 	rw_destroy(&idr->idr_lock);
+}
 void *
 idr_find(struct idr *idr, int id)
+{
 	const struct idr_node *node;
 	void *data;
 	rw_enter(&idr->idr_lock, RW_READER);
 	node = rb_tree_find_node(&idr->idr_tree, &id);
 	data = (node == NULL? NULL : node->in_data);
 	rw_exit(&idr->idr_lock);
 	return data;
+}
 void *
 idr_replace(struct idr *idr, void *replacement, int id)
+{
 	struct idr_node *node;
 	void *result;
 	rw_enter(&idr->idr_lock, RW_WRITER);
 	node = rb_tree_find_node(&idr->idr_tree, &id);
 	if (node == NULL) {
 		result = ERR_PTR(-ENOENT);
 	} else {
 		result = node->in_data;
 		node->in_data = replacement;
+	}
 	rw_exit(&idr->idr_lock);
 	return result;
+}
 void
 idr_remove(struct idr *idr, int id)
+{
 	struct idr_node *node;
 	rw_enter(&idr->idr_lock, RW_WRITER);
 	node = rb_tree_find_node(&idr->idr_tree, &id);
 	KASSERT(node != NULL);
 	rb_tree_remove_node(&idr->idr_tree, node);
 	rw_exit(&idr->idr_lock);
 	kmem_free(node, sizeof(*node));
+}
 void
 idr_remove_all(struct idr *idr)
+{
 	struct idr_node *node;
 	rw_enter(&idr->idr_lock, RW_WRITER);
 	while ((node = rb_tree_iterate(&idr->idr_tree, NULL, RB_DIR_RIGHT)) !=
 	    NULL) {
 		rb_tree_remove_node(&idr->idr_tree, node);
 		rw_exit(&idr->idr_lock);
 		kmem_free(node, sizeof(*node));
 		rw_enter(&idr->idr_lock, RW_WRITER);
+	}
 	rw_exit(&idr->idr_lock);
+}
 int
 idr_pre_get(struct idr *idr, int flags __unused /* XXX */)
+{
-	struct idr_node *const temp = kmem_alloc(sizeof(*temp), KM_SLEEP);
+	struct idr_node *temp = kmem_alloc(sizeof(*temp), KM_SLEEP);
 	if (temp == NULL)
 		return 0;
 	rw_enter(&idr->idr_lock, RW_WRITER);
-	if (idr->idr_temp == NULL)
+	if (idr->idr_temp == NULL) {
 		idr->idr_temp = temp;
-	else
+		temp = NULL;
 		kmem_free(temp, sizeof(*temp));
 	rw_exit(&idr->idr_lock);
 	if (temp != NULL)
 		kmem_free(temp, sizeof(*temp));
 	return 1;
+}
 int
 idr_get_new_above(struct idr *idr, void *data, int min_id, int *id)
+{
 	struct idr_node *node, *search, *collision __unused;
 	int want_id = min_id;
 	rw_enter(&idr->idr_lock, RW_WRITER);
 	node = idr->idr_temp;
 	if (node == NULL) {
 		rw_exit(&idr->idr_lock);
 		return -EAGAIN;
+	}
 	idr->idr_temp = NULL;
 	search = rb_tree_find_node_geq(&idr->idr_tree, &min_id);
 	while ((search != NULL) && (search->in_index == want_id)) {
 		search = rb_tree_iterate(&idr->idr_tree, search, RB_DIR_RIGHT);
 		want_id++;
+	}
 	node->in_index = want_id;
 	node->in_data = data;
 	collision = rb_tree_insert_node(&idr->idr_tree, node);
 	KASSERT(collision == node);
 	rw_exit(&idr->idr_lock);
 	return 0;
+}
 int
 idr_for_each(struct idr *idr, int (*proc)(int, void *, void *), void *arg)
+{
 	struct idr_node *node = NULL;
 	int error = 0;
 	rw_enter(&idr->idr_lock, RW_READER);
 	while ((node = rb_tree_iterate(&idr->idr_tree, node, RB_DIR_RIGHT))
 	    != NULL) {
 		error = (*proc)(node->in_index, node->in_data, arg);
 		if (error)
 			break;
+	}
 	rw_exit(&idr->idr_lock);
 	return error;
+}