btrfs: cleanup iterating over prop_handlers array

This patch eliminates the last item of prop_handlers array which is used
to check end of array and instead uses ARRAY_SIZE macro.
Though this is a very tiny optimization, using ARRAY_SIZE macro is a
good practice to iterate array.

Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c
index dca137b04095..f9e60231f685 100644
--- a/fs/btrfs/props.c
+++ b/fs/btrfs/props.c
@@ -49,18 +49,16 @@ static struct prop_handler prop_handlers[] = {
                 .extract = prop_compression_extract,
                 .inheritable = 1
         },
-        {
-                .xattr_name = NULL
-        }
 };
 
 void __init btrfs_props_init(void)
 {
-        struct prop_handler *p;
+        int i;
 
         hash_init(prop_handlers_ht);
 
-        for (p = &prop_handlers[0]; p->xattr_name; p++) {
+        for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
+                struct prop_handler *p = &prop_handlers[i];
                 u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));
 
                 hash_add(prop_handlers_ht, &p->node, h);
@@ -301,15 +299,16 @@ static int inherit_props(struct btrfs_trans_handle *trans,
                          struct inode *inode,
                          struct inode *parent)
 {
-        const struct prop_handler *h;
         struct btrfs_root *root = BTRFS_I(inode)->root;
         int ret;
+        int i;
 
         if (!test_bit(BTRFS_INODE_HAS_PROPS,
                       &BTRFS_I(parent)->runtime_flags))
                 return 0;
 
-        for (h = &prop_handlers[0]; h->xattr_name; h++) {
+        for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
+                const struct prop_handler *h = &prop_handlers[i];
                 const char *value;
                 u64 num_bytes;