buffer_head.h: add getblk_unmovable() for 3.18 ext4 backport

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 78fed225695ed65e12f8015fa9fd114c5ebea92c..d6a8a8de94223aab17184969d1121bb50b4bf1d1 100644 (file)
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -300,6 +300,12 @@ sb_bread_unmovable(struct super_block *sb, sector_t block)
        return sb_bread(sb, block);
 }
 
+static inline struct buffer_head *getblk_unmovable(struct block_device *bdev,
+                                       sector_t block, unsigned size)
+{
+       return __getblk(bdev, block, size);
+}
+
 static inline void
 sb_breadahead(struct super_block *sb, sector_t block)
 {