btrfs: Replace multiple atomic_inc() with atomic_add()

This patch replaces multiple atomic_inc() with atomic_add() in
delayed-inode.c to reduce source code and have few instructions
for compilation.

Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index df1a496..af2ecca 100644 (file)
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -108,8 +108,8 @@ static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode)
                        return node;
                }
                btrfs_inode->delayed_node = node;
-               atomic_inc(&node->refs);        /* can be accessed */
-               atomic_inc(&node->refs);        /* cached in the inode */
+               /* can be accessed and cached in the inode */
+               atomic_add(2, &node->refs);
                spin_unlock(&root->inode_lock);
                return node;
        }
@@ -138,8 +138,8 @@ again:
                return ERR_PTR(-ENOMEM);
        btrfs_init_delayed_node(node, root, ino);
 
-       atomic_inc(&node->refs);        /* cached in the btrfs inode */
-       atomic_inc(&node->refs);        /* can be accessed */
+       /* cached in the btrfs inode and can be accessed */
+       atomic_add(2, &node->refs);
 
        ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM);
        if (ret) {