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>

1 files changed, 2 insertions, 9 deletions

diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index 0303da8..06ea5cd 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -242,12 +242,9 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
 /*
  * Fills in the passed counter variables, so you can prepare pagelist metadata
  * before calling ceph_encode_locks.
- *
- * FIXME: add counters to struct file_lock_context so we don't need to do this?
  */
 void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
 {
-	struct file_lock *lock;
 	struct file_lock_context *ctx;
 
 	*fcntl_count = 0;
@@ -255,12 +252,8 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
 
 	ctx = inode->i_flctx;
 	if (ctx) {
-		spin_lock(&ctx->flc_lock);
-		list_for_each_entry(lock, &ctx->flc_posix, fl_list)
-			++(*fcntl_count);
-		list_for_each_entry(lock, &ctx->flc_flock, fl_list)
-			++(*flock_count);
-		spin_unlock(&ctx->flc_lock);
+		*fcntl_count = ctx->flc_posix_cnt;
+		*flock_count = ctx->flc_flock_cnt;
 	}
 	dout("counted %d flock locks and %d fcntl locks",
 	     *flock_count, *fcntl_count);