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fs: Remove ext3 filesystem driver

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The functionality of ext3 is fully supported by ext4 driver. Major
distributions (SUSE, RedHat) already use ext4 driver to handle ext3
filesystems for quite some time. There is some ugliness in mm resulting
from jbd cleaning buffers in a dirty page without cleaning page dirty
bit and also support for buffer bouncing in the block layer when stable
pages are required is there only because of jbd. So let's remove the
ext3 driver. This saves us some 28k lines of duplicated code.

Acked-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
2015-06-18 16:52:29 +02:00
committed by Jan Kara
parent 82ff50b222
commit c290ea01ab
46 changed files with 87 additions and 28109 deletions
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41
fs/ext4/Kconfig
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@@ -1,5 +1,38 @@
# Ext3 configs are here for backward compatibility with old configs which may
# have EXT3_FS set but not EXT4_FS set and thus would result in non-bootable
# kernels after the removal of ext3 driver.
config EXT3_FS
tristate "The Extended 3 (ext3) filesystem"
# These must match EXT4_FS selects...
select EXT4_FS
select JBD2
select CRC16
select CRYPTO
select CRYPTO_CRC32C
help
This config option is here only for backward compatibility. ext3
filesystem is now handled by the ext4 driver.
config EXT3_FS_POSIX_ACL
bool "Ext3 POSIX Access Control Lists"
depends on EXT3_FS
select EXT4_FS_POSIX_ACL
select FS_POSIX_ACL
help
This config option is here only for backward compatibility. ext3
filesystem is now handled by the ext4 driver.
config EXT3_FS_SECURITY
bool "Ext3 Security Labels"
depends on EXT3_FS
select EXT4_FS_SECURITY
help
This config option is here only for backward compatibility. ext3
filesystem is now handled by the ext4 driver.
config EXT4_FS
tristate "The Extended 4 (ext4) filesystem"
# Please update EXT3_FS selects when changing these
select JBD2
select CRC16
select CRYPTO
@@ -28,14 +61,14 @@ config EXT4_FS
If unsure, say N.
config EXT4_USE_FOR_EXT23
config EXT4_USE_FOR_EXT2
bool "Use ext4 for ext2/ext3 file systems"
depends on EXT4_FS
depends on EXT3_FS=n || EXT2_FS=n
depends on EXT2_FS=n
default y
help
Allow the ext4 file system driver code to be used for ext2 or
ext3 file system mounts. This allows users to reduce their
Allow the ext4 file system driver code to be used for ext2
file system mounts. This allows users to reduce their
compiled kernel size by using one file system driver for
ext2, ext3, and ext4 file systems.