f2fs: handle inline data independently in f2fs_bmap

We'd better handle inline data case independently in f2fs_bmap().
It can reduce our handling time in f2fs_bmap().

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 6b89b25..150c12a 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1058,6 +1058,11 @@
 
 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
 {
+	struct inode *inode = mapping->host;
+
+	if (f2fs_has_inline_data(inode))
+		return 0;
+
 	return generic_block_bmap(mapping, block, get_data_block);
 }