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| author | Michel Lespinasse <walken@google.com> | 2012-10-08 16:30:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:22:31 +0900 |
| commit | 1638113d9d8b7e04c1eeae9014d43f6381a74040 (patch) | |
| tree | 6eccf05889ebd3ebf916a602b4c8dc74b2f8105f /ipc | |
| parent | 1ae1c1d09f220ded48ee9a7d91a65e94f95c4af1 (diff) | |
| download | lwn-1638113d9d8b7e04c1eeae9014d43f6381a74040.tar.gz lwn-1638113d9d8b7e04c1eeae9014d43f6381a74040.zip | |
ipc/mqueue: remove unnecessary rb_init_node() calls
Commit d6629859b36d ("ipc/mqueue: improve performance of send/recv") and
ce2d52cc ("ipc/mqueue: add rbtree node caching support") introduced an
rbtree of message priorities, and usage of rb_init_node() to initialize
the corresponding nodes. As it turns out, rb_init_node() is unnecessary
here, as the nodes are fully initialized on insertion by rb_link_node()
and the code doesn't access nodes that aren't inserted on the rbtree.
Removing the rb_init_node() calls as I removed that function during
rbtree API cleanups (the only other use of it was in a place that
similarly didn't require it).
Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/mqueue.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 6d255e535d03..6b97e2466fad 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -142,7 +142,6 @@ static int msg_insert(struct msg_msg *msg, struct mqueue_inode_info *info) leaf = kmalloc(sizeof(*leaf), GFP_ATOMIC); if (!leaf) return -ENOMEM; - rb_init_node(&leaf->rb_node); INIT_LIST_HEAD(&leaf->msg_list); info->qsize += sizeof(*leaf); } @@ -1013,7 +1012,6 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr, if (!info->node_cache && new_leaf) { /* Save our speculative allocation into the cache */ - rb_init_node(&new_leaf->rb_node); INIT_LIST_HEAD(&new_leaf->msg_list); info->node_cache = new_leaf; info->qsize += sizeof(*new_leaf); @@ -1121,7 +1119,6 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr, if (!info->node_cache && new_leaf) { /* Save our speculative allocation into the cache */ - rb_init_node(&new_leaf->rb_node); INIT_LIST_HEAD(&new_leaf->msg_list); info->node_cache = new_leaf; info->qsize += sizeof(*new_leaf); |