[PATCH 05/12] ext4: make the IS_EXT2_SB/IS_EXT3_SB checks more robust

[Christoph Hellwig <hch@xxxxxx>]

Check for sb->s_type which is the right place to look at the file system
type, not the holder, which is just an implementation detail in the VFS
helpers.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/ext4/super.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c94ebf704616e5..193d665813b611 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -140,7 +140,7 @@ static struct file_system_type ext2_fs_type = {
 };
 MODULE_ALIAS_FS("ext2");
 MODULE_ALIAS("ext2");
-#define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type)
+#define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type)
 #else
 #define IS_EXT2_SB(sb) (0)
 #endif
@@ -156,7 +156,7 @@ static struct file_system_type ext3_fs_type = {
 };
 MODULE_ALIAS_FS("ext3");
 MODULE_ALIAS("ext3");
-#define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type)
+#define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type)
 
 
 static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags,
-- 
2.39.2