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authorJeff Layton <jlayton@primarydata.com>2015-01-16 15:05:57 -0500
committerJeff Layton <jeff.layton@primarydata.com>2015-01-16 16:08:50 -0500
commit9bd0f45b7037fcfa8b575c7e27d0431d6e6dc3bb (patch)
tree205f3c2107cec0323dc25c959fefcc4fd709fa49 /fs/cifs/file.c
parent7448cc37b1a6b620d948aaee3bb30960c06d5d5d (diff)
locks: keep a count of locks on the flctx lists
This makes things a bit more efficient in the cifs and ceph lock pushing code. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Acked-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r--fs/cifs/file.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index b65166eb111e..8c2ca6f62bad 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1125,7 +1125,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
struct file_lock *flock;
struct file_lock_context *flctx = inode->i_flctx;
- unsigned int count = 0, i;
+ unsigned int i;
int rc = 0, xid, type;
struct list_head locks_to_send, *el;
struct lock_to_push *lck, *tmp;
@@ -1136,20 +1136,14 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
if (!flctx)
goto out;
- spin_lock(&flctx->flc_lock);
- list_for_each(el, &flctx->flc_posix) {
- count++;
- }
- spin_unlock(&flctx->flc_lock);
-
INIT_LIST_HEAD(&locks_to_send);
/*
- * Allocating count locks is enough because no FL_POSIX locks can be
- * added to the list while we are holding cinode->lock_sem that
+ * Allocating flc_posix_cnt locks is enough because no FL_POSIX locks
+ * can be added to the list while we are holding cinode->lock_sem that
* protects locking operations of this inode.
*/
- for (i = 0; i < count; i++) {
+ for (i = 0; i < flctx->flc_posix_cnt; i++) {
lck = kmalloc(sizeof(struct lock_to_push), GFP_KERNEL);
if (!lck) {
rc = -ENOMEM;