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| author |   Dan Williams <dan.j.williams@intel.com> | 2017-05-08 10:55:27 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-05-08 10:55:27 -0700 |
| commit | ef51042472f55b325fd7f2b26a2e29fd89757234 (patch) | |
| tree | ad814d3a1537f69b6ca54c0417260324e8f1a6eb /fs/Kconfig | |
| parent | device-dax: Tell kbuild DEV_DAX_PMEM depends on DEV_DAX (diff) | |
| download | linux-dev-ef51042472f55b325fd7f2b26a2e29fd89757234.tar.xz linux-dev-ef51042472f55b325fd7f2b26a2e29fd89757234.zip | |
block, dax: move "select DAX" from BLOCK to FS_DAX
For configurations that do not enable DAX filesystems or drivers, do not
require the DAX core to be built.
Given that the 'direct_access' method has been removed from
'block_device_operations', we can also go ahead and remove the
block-related dax helper functions from fs/block_dev.c to
drivers/dax/super.c. This keeps dax details out of the block layer and
lets the DAX core be built as a module in the FS_DAX=n case.
Filesystems need to include dax.h to call bdev_dax_supported().
Cc: linux-xfs@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/Kconfig')
| -rw-r--r-- | fs/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 83eab52fb3f6..b0e42b6a96b9 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -39,6 +39,7 @@ config FS_DAX depends on MMU depends on !(ARM || MIPS || SPARC) select FS_IOMAP + select DAX help Direct Access (DAX) can be used on memory-backed block devices. If the block device supports DAX and the filesystem supports DAX, |