vfs: move the clone/dedupe/remap helpers to a single file
I would like to move the generic helper functions that support the file
remap range operations (aka clone and dedupe) to a separate file under
fs/. For the moment, I have a few goals here: one is to declutter
fs/read_write.c and mm/filemap.c. The second goal is to be able to
deselect all the remap code if no filesystems require it.
The third (and much more long term) goal is to have a place to land the
generic code for the atomic file extent swap functionality, since it
will reuse some of the functionality. Someday. Whenever I get around
to submitting that again.
AFAICT, nobody is attempting to land any major changes in any of the vfs
remap functions during the 5.10 window -- for-next showed conflicts only
in the Makefile, so it seems like a quiet enough time to do this. There
are no functional changes here, it's just moving code blocks around.
v2: move a few more things
vfs: move the generic write and copy checks out of mm
The generic write check helpers also don't have much to do with the page
cache, so move them to the vfs.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
3 files changed
