ext4: use atomic functions to set bh_state

Use the BUFFER_FNS functions (set_buffer_foo) to set buffer
head state atomically instead of nonatomic __set_bit().

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 555155d239df..bb36a28f8ff3 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2622,8 +2622,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
                                  */
                                 if (allocated > max_blocks)
                                         allocated = max_blocks;
-                                /* mark the buffer unwritten */
-                                __set_bit(BH_Unwritten, &bh_result->b_state);
+                                set_buffer_unwritten(bh_result);
                                 goto out2;
                         }
 
@@ -2729,7 +2728,7 @@ outnew:
         if (extend_disksize && inode->i_size > EXT4_I(inode)->i_disksize)
                 EXT4_I(inode)->i_disksize = inode->i_size;
 
-        __set_bit(BH_New, &bh_result->b_state);
+        set_buffer_new(bh_result);
 
         /* Cache only when it is _not_ an uninitialized extent */
         if (create != EXT4_CREATE_UNINITIALIZED_EXT)
@@ -2739,7 +2738,7 @@ out:
         if (allocated > max_blocks)
                 allocated = max_blocks;
         ext4_ext_show_leaf(inode, path);
-        __set_bit(BH_Mapped, &bh_result->b_state);
+        set_buffer_mapped(bh_result);
         bh_result->b_bdev = inode->i_sb->s_bdev;
         bh_result->b_blocknr = newblock;
 out2: