ext4: Do not override ext2 or ext3 if built they are built as modules

The CONFIG_EXT4_USE_FOR_EXT23 option must not try to take over the
ext2 or ext3 file systems if the those file system drivers are
configured to be built as mdoules.

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

diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index a6b4e93833d6ccbe4ef5444f727680b3f1f5efe1..9acf7e808139d3df688da7d66ffb33b5cf081d8e 100644 (file)
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -28,7 +28,7 @@ config EXT4_FS
 
 config EXT4_USE_FOR_EXT23
        bool "Use ext4 for ext2/ext3 file systems"
-       depends on !EXT3_FS || !EXT2_FS
+       depends on EXT3_FS=n || EXT2_FS=n
        default y
        help
          Allow the ext4 file system driver code to be used for ext2 or

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2b13dcfcf775ffaf18c889d5f8444d389535b18f..8b58a144c31b8210f502b34d532a131aaccffce2 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3964,7 +3964,7 @@ static int ext4_get_sb(struct file_system_type *fs_type, int flags,
        return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt);
 }
 
-#if !defined(CONTIG_EXT2_FS) && defined(CONFIG_EXT4_USE_FOR_EXT23)
+#if !defined(CONTIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23)
 static struct file_system_type ext2_fs_type = {
        .owner          = THIS_MODULE,
        .name           = "ext2",
@@ -3990,7 +3990,7 @@ static inline void register_as_ext2(void) { }
 static inline void unregister_as_ext2(void) { }
 #endif
 
-#if !defined(CONTIG_EXT3_FS) && defined(CONFIG_EXT4_USE_FOR_EXT23)
+#if !defined(CONTIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23)
 static struct file_system_type ext3_fs_type = {
        .owner          = THIS_MODULE,
        .name           = "ext3",