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linux/fs/ext4
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Dan Williams f5705aa8cf dax, xfs, ext4: compile out iomap-dax paths in the FS_DAX=n case 
Tetsuo reports:

  fs/built-in.o: In function `xfs_file_iomap_end':
  xfs_iomap.c:(.text+0xe0ef9): undefined reference to `put_dax'
  fs/built-in.o: In function `xfs_file_iomap_begin':
  xfs_iomap.c:(.text+0xe1a7f): undefined reference to `dax_get_by_host'
  make: *** [vmlinux] Error 1
  $ grep DAX .config
  CONFIG_DAX=m
  # CONFIG_DEV_DAX is not set
  # CONFIG_FS_DAX is not set

When FS_DAX=n we can/must throw away the dax code in filesystems.
Implement 'fs_' versions of dax_get_by_host() and put_dax() that are
nops in the FS_DAX=n case.

Cc: <linux-xfs@vger.kernel.org>
Cc: <linux-ext4@vger.kernel.org>
Cc: Jan Kara <jack@suse.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Fixes: ef51042472 ("block, dax: move 'select DAX' from BLOCK to FS_DAX")
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2017-05-13 17:52:16 -07:00
..
acl.c ext4: use current_time() for inode timestamps 2016-11-14 21:40:10 -05:00
acl.h
balloc.c The major change this cycle is deleting ext4's copy of the file system 2016-07-26 18:35:55 -07:00
bitmap.c
block_validity.c ext4: add missing KERN_CONT to a few more debugging uses 2016-10-15 09:57:31 -04:00
dir.c ext4: remove unused variable 2016-09-30 02:14:56 -04:00
ext4_extents.h ext4: fix misspellings in comments. 2016-03-09 23:49:05 -05:00
ext4_jbd2.c ext4: add shutdown bit and check for it 2017-02-05 01:28:48 -05:00
ext4_jbd2.h ext4: do not perform data journaling when data is encrypted 2016-12-10 17:54:58 -05:00
ext4.h Add GETFSMAP support; some performance improvements for very large 2017-05-08 11:30:05 -07:00
extents_status.c scripts/spelling.txt: add "comsume(r)" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
extents_status.h ext4: move procfs registration code to fs/ext4/sysfs.c 2015-09-23 12:46:17 -04:00
extents.c ext4: do not polute the extents cache while shifting extents 2017-01-08 21:00:35 -05:00
file.c ext4: return to starting transaction in ext4_dax_huge_fault() 2017-05-12 15:57:16 -07:00
fsmap.c ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
fsmap.h ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
fsync.c ext4: add shutdown bit and check for it 2017-02-05 01:28:48 -05:00
hash.c ext4: move halfmd4 into hash.c directly 2017-02-02 11:52:14 -05:00
ialloc.c ext4: inherit encryption xattr before other xattrs 2017-05-02 00:49:54 -04:00
indirect.c ext4: refactor direct IO code 2016-05-13 00:44:16 -04:00
inline.c ext4: trim return value and 'dir' argument from ext4_insert_dentry() 2017-04-29 23:27:26 -04:00
inode.c dax, xfs, ext4: compile out iomap-dax paths in the FS_DAX=n case 2017-05-13 17:52:16 -07:00
ioctl.c Add GETFSMAP support; some performance improvements for very large 2017-05-08 11:30:05 -07:00
Kconfig dax: fix build warnings with FS_DAX and !FS_IOMAP 2017-01-24 16:26:14 -08:00
Makefile ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
mballoc.c Merge branch 'akpm' (patches from Andrew) 2017-05-08 18:17:56 -07:00
mballoc.h ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
migrate.c ext4: fix misspellings in comments. 2016-03-09 23:49:05 -05:00
mmp.c block,fs: use REQ_* flags directly 2016-11-01 09:43:26 -06:00
move_extent.c Fix a memory leak on an error path, and two races when modifying 2017-03-26 10:29:21 -07:00
namei.c Only bug fixes and cleanups for this merge window. 2017-05-08 11:40:34 -07:00
page-io.c ext4: replace BUG_ON with WARN_ONCE in ext4_end_bio() 2017-04-30 20:08:05 -04:00
readpage.c Merge branch 'akpm' (patches from Andrew) 2016-07-26 19:55:54 -07:00
resize.c ext4: rename s_resize_flags to s_ext4_flags 2017-02-05 01:27:48 -05:00
super.c Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2017-05-12 15:43:10 -07:00
symlink.c ext4: Add statx support 2017-04-03 01:05:58 -04:00
sysfs.c ext4: constify static data that is never modified 2017-04-29 23:47:50 -04:00
truncate.h ext4: fix races between page faults and hole punching 2015-12-07 14:28:03 -05:00
xattr_security.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_trusted.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_user.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr.c ext4: remove ext4_xattr_check_entry() 2017-04-30 00:01:02 -04:00
xattr.h ext4: fix deadlock between inline_data and ext4_expand_extra_isize_ea() 2017-01-11 21:50:46 -05:00