Btrfs: Abstract similar code for btrfs_block_rsv_add{, _noflush}

btrfs_block_rsv_add{, _noflush}() have similar code, so abstract that code.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 12 insertions, 16 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 0b044e509e9f..0f47b3e2010e 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3796,16 +3796,16 @@ void btrfs_free_block_rsv(struct btrfs_root *root,
         kfree(rsv);
 }
 
-int btrfs_block_rsv_add(struct btrfs_root *root,
-                        struct btrfs_block_rsv *block_rsv,
-                        u64 num_bytes)
+static inline int __block_rsv_add(struct btrfs_root *root,
+                                  struct btrfs_block_rsv *block_rsv,
+                                  u64 num_bytes, int flush)
 {
         int ret;
 
         if (num_bytes == 0)
                 return 0;
 
-        ret = reserve_metadata_bytes(root, block_rsv, num_bytes, 1);
+        ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);
         if (!ret) {
                 block_rsv_add_bytes(block_rsv, num_bytes, 1);
                 return 0;
@@ -3814,22 +3814,18 @@ int btrfs_block_rsv_add(struct btrfs_root *root,
         return ret;
 }
 
+int btrfs_block_rsv_add(struct btrfs_root *root,
+                        struct btrfs_block_rsv *block_rsv,
+                        u64 num_bytes)
+{
+        return __block_rsv_add(root, block_rsv, num_bytes, 1);
+}
+
 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
                                 struct btrfs_block_rsv *block_rsv,
                                 u64 num_bytes)
 {
-        int ret;
-
-        if (num_bytes == 0)
-                return 0;
-
-        ret = reserve_metadata_bytes(root, block_rsv, num_bytes, 0);
-        if (!ret) {
-                block_rsv_add_bytes(block_rsv, num_bytes, 1);
-                return 0;
-        }
-
-        return ret;
+        return __block_rsv_add(root, block_rsv, num_bytes, 0);
 }
 
 int btrfs_block_rsv_check(struct btrfs_root *root,