1 files changed, 7 insertions, 4 deletions

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 495ab21b9832..1ae5004e93fc 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -314,25 +314,28 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
         if (unlikely(!bh)) {
                 ext4_error(sb, __func__,
                             "Cannot read block bitmap - "
-                            "block_group = %d, block_bitmap = %llu",
-                            (int)block_group, (unsigned long long)bitmap_blk);
+                            "block_group = %lu, block_bitmap = %llu",
+                            block_group, bitmap_blk);
                 return NULL;
         }
         if (bh_uptodate_or_lock(bh))
                 return bh;
 
+        spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group));
         if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
                 ext4_init_block_bitmap(sb, bh, block_group, desc);
                 set_buffer_uptodate(bh);
                 unlock_buffer(bh);
+                spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
                 return bh;
         }
+        spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
         if (bh_submit_read(bh) < 0) {
                 put_bh(bh);
                 ext4_error(sb, __func__,
                             "Cannot read block bitmap - "
-                            "block_group = %d, block_bitmap = %llu",
-                            (int)block_group, (unsigned long long)bitmap_blk);
+                            "block_group = %lu, block_bitmap = %llu",
+                            block_group, bitmap_blk);
                 return NULL;
         }
         ext4_valid_block_bitmap(sb, desc, block_group, bh);