Commit 9636e650 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

fs: build the legacy direct I/O code conditionally 



Add a new LEGACY_DIRECT_IO config symbol that is only selected by the
file systems that still use the legacy blockdev_direct_IO code, so that
kernels without support for those file systems don't need to build the
code.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Reviewed-by: default avatarEric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20230125065839.191256-3-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 439bc39b

fs/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -18,6 +18,10 @@ config VALIDATE_FS_PARSER 
config FS_IOMAP

	bool



# old blockdev_direct_IO implementation.  Use iomap for new code instead

config LEGACY_DIRECT_IO

	bool



if BLOCK



source "fs/ext2/Kconfig"

fs/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -19,13 +19,14 @@ obj-y := open.o read_write.o file_table.o super.o \ 
		kernel_read_file.o remap_range.o



ifeq ($(CONFIG_BLOCK),y)

obj-y +=	buffer.o direct-io.o mpage.o

obj-y +=	buffer.o mpage.o

else

obj-y +=	no-block.o

endif



obj-$(CONFIG_PROC_FS) += proc_namespace.o



obj-$(CONFIG_LEGACY_DIRECT_IO)	+= direct-io.o

obj-y				+= notify/

obj-$(CONFIG_EPOLL)		+= eventpoll.o

obj-y				+= anon_inodes.o

fs/affs/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
config AFFS_FS

	tristate "Amiga FFS file system support"

	depends on BLOCK

	select LEGACY_DIRECT_IO

	help

	  The Fast File System (FFS) is the common file system used on hard

	  disks by Amiga(tm) systems since AmigaOS Version 1.3 (34.20).  Say Y

fs/exfat/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
config EXFAT_FS

	tristate "exFAT filesystem support"

	select NLS

	select LEGACY_DIRECT_IO

	help

	  This allows you to mount devices formatted with the exFAT file system.

	  exFAT is typically used on SD-Cards or USB sticks.

fs/ext2/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
config EXT2_FS

	tristate "Second extended fs support"

	select FS_IOMAP

	select LEGACY_DIRECT_IO

	help

	  Ext2 is a standard Linux file system for hard disks.