Btrfs: add tree_mod_dont_log helper

Replace duplicate code by small inline helper function.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

1 files changed, 15 insertions, 9 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 26e8dc1681b0..c7c48489b963 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -455,14 +455,25 @@ unlock:
         return ret;
 }
 
+static inline int tree_mod_dont_log(struct btrfs_fs_info *fs_info,
+                                    struct extent_buffer *eb) {
+        smp_mb();
+        if (list_empty(&(fs_info)->tree_mod_seq_list))
+                return 1;
+        if (!eb)
+                return 0;
+        if (btrfs_header_level(eb) == 0)
+                return 1;
+        return 0;
+}
+
 static inline int tree_mod_alloc(struct btrfs_fs_info *fs_info, gfp_t flags,
                                  struct tree_mod_elem **tm_ret)
 {
         struct tree_mod_elem *tm;
         int seq;
 
-        smp_mb();
-        if (list_empty(&fs_info->tree_mod_seq_list))
+        if (tree_mod_dont_log(fs_info, NULL))
                 return 0;
 
         tm = *tm_ret = kzalloc(sizeof(*tm), flags);
@@ -643,8 +654,7 @@ tree_mod_log_eb_copy(struct btrfs_fs_info *fs_info, struct extent_buffer *dst,
         int ret;
         int i;
 
-        smp_mb();
-        if (list_empty(&fs_info->tree_mod_seq_list))
+        if (tree_mod_dont_log(fs_info, NULL))
                 return;
 
         if (btrfs_header_level(dst) == 0 && btrfs_header_level(src) == 0)
@@ -691,11 +701,7 @@ static void tree_mod_log_free_eb(struct btrfs_fs_info *fs_info,
         int ret;
         u32 nritems;
 
-        smp_mb();
-        if (list_empty(&fs_info->tree_mod_seq_list))
-                return;
-
-        if (btrfs_header_level(eb) == 0)
+        if (tree_mod_dont_log(fs_info, eb))
                 return;
 
         nritems = btrfs_header_nritems(eb);