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authorPaul E. McKenney <paulmck@us.ibm.com>2005-11-07 00:59:17 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:35 -0800
commit665a7583f32ab5b3bfe7a4d88da506542f7cdd75 (patch)
tree2b45def3f7ecaf322b05622a635510fe8aef51af
parent9f46080c41d5f3f7c00b4e169ba4b0b2865258bf (diff)
downloadlinux-linaro-stable-665a7583f32ab5b3bfe7a4d88da506542f7cdd75.tar.gz
[PATCH] Remove hlist_for_each_rcu() API, convert existing use to hlist_for_each_entry_rcu
Remove the hlist_for_each_rcu() API, which is used only in one place, and is trivially converted to hlist_for_each_entry_rcu(), making the code shorter and more readable. Any out-of-tree uses may be similarly converted. Signed-off-by: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--Documentation/RCU/whatisRCU.txt2
-rw-r--r--fs/dcache.c10
-rw-r--r--include/linux/list.h13
3 files changed, 8 insertions, 17 deletions
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index 354d89c78377..15da16861fa3 100644
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@ -772,8 +772,6 @@ RCU pointer/list traversal:
list_for_each_entry_rcu
list_for_each_continue_rcu (to be deprecated in favor of new
list_for_each_entry_continue_rcu)
- hlist_for_each_rcu (to be deprecated in favor of
- hlist_for_each_entry_rcu)
hlist_for_each_entry_rcu
RCU pointer update:
diff --git a/fs/dcache.c b/fs/dcache.c
index e90512ed35a4..17e439138681 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -644,7 +644,7 @@ void shrink_dcache_parent(struct dentry * parent)
*
* Prune the dentries that are anonymous
*
- * parsing d_hash list does not hlist_for_each_rcu() as it
+ * parsing d_hash list does not hlist_for_each_entry_rcu() as it
* done under dcache_lock.
*
*/
@@ -1043,15 +1043,13 @@ struct dentry * __d_lookup(struct dentry * parent, struct qstr * name)
struct hlist_head *head = d_hash(parent,hash);
struct dentry *found = NULL;
struct hlist_node *node;
+ struct dentry *dentry;
rcu_read_lock();
- hlist_for_each_rcu(node, head) {
- struct dentry *dentry;
+ hlist_for_each_entry_rcu(dentry, node, head, d_hash) {
struct qstr *qstr;
- dentry = hlist_entry(node, struct dentry, d_hash);
-
if (dentry->d_name.hash != hash)
continue;
if (dentry->d_parent != parent)
@@ -1123,7 +1121,7 @@ int d_validate(struct dentry *dentry, struct dentry *dparent)
spin_lock(&dcache_lock);
base = d_hash(dparent, dentry->d_name.hash);
hlist_for_each(lhp,base) {
- /* hlist_for_each_rcu() not required for d_hash list
+ /* hlist_for_each_entry_rcu() not required for d_hash list
* as it is parsed under dcache_lock
*/
if (dentry == hlist_entry(lhp, struct dentry, d_hash)) {
diff --git a/include/linux/list.h b/include/linux/list.h
index 084971f333fe..fbfca73355a3 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -601,7 +601,7 @@ static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h)
* or hlist_del_rcu(), running on this same list.
* However, it is perfectly legal to run concurrently with
* the _rcu list-traversal primitives, such as
- * hlist_for_each_rcu(), used to prevent memory-consistency
+ * hlist_for_each_entry_rcu(), used to prevent memory-consistency
* problems on Alpha CPUs. Regardless of the type of CPU, the
* list-traversal primitive must be guarded by rcu_read_lock().
*/
@@ -650,7 +650,7 @@ static inline void hlist_add_after(struct hlist_node *n,
* or hlist_del_rcu(), running on this same list.
* However, it is perfectly legal to run concurrently with
* the _rcu list-traversal primitives, such as
- * hlist_for_each_rcu(), used to prevent memory-consistency
+ * hlist_for_each_entry_rcu(), used to prevent memory-consistency
* problems on Alpha CPUs.
*/
static inline void hlist_add_before_rcu(struct hlist_node *n,
@@ -675,7 +675,7 @@ static inline void hlist_add_before_rcu(struct hlist_node *n,
* or hlist_del_rcu(), running on this same list.
* However, it is perfectly legal to run concurrently with
* the _rcu list-traversal primitives, such as
- * hlist_for_each_rcu(), used to prevent memory-consistency
+ * hlist_for_each_entry_rcu(), used to prevent memory-consistency
* problems on Alpha CPUs.
*/
static inline void hlist_add_after_rcu(struct hlist_node *prev,
@@ -699,11 +699,6 @@ static inline void hlist_add_after_rcu(struct hlist_node *prev,
for (pos = (head)->first; pos && ({ n = pos->next; 1; }); \
pos = n)
-#define hlist_for_each_rcu(pos, head) \
- for ((pos) = (head)->first; \
- rcu_dereference((pos)) && ({ prefetch((pos)->next); 1; }); \
- (pos) = (pos)->next)
-
/**
* hlist_for_each_entry - iterate over list of given type
* @tpos: the type * to use as a loop counter.
@@ -756,7 +751,7 @@ static inline void hlist_add_after_rcu(struct hlist_node *prev,
/**
* hlist_for_each_entry_rcu - iterate over rcu list of given type
- * @pos: the type * to use as a loop counter.
+ * @tpos: the type * to use as a loop counter.
* @pos: the &struct hlist_node to use as a loop counter.
* @head: the head for your list.
* @member: the name of the hlist_node within the struct.