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author | Dave Chinner <dchinner@redhat.com> | 2015-06-04 09:18:18 +1000 |
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committer | Dave Chinner <david@fromorbit.com> | 2015-06-04 09:18:18 +1000 |
commit | ce5c5d554dc47a4fb4360c84b72231fea081e7a0 (patch) | |
tree | 93915bd75b2061c36dfbffd10a8efd22e0d7282b /fs/f2fs/dir.c | |
parent | e842f2903908934187af7232fb5b21da527d1757 (diff) | |
download | linux-ce5c5d554dc47a4fb4360c84b72231fea081e7a0.tar.gz linux-ce5c5d554dc47a4fb4360c84b72231fea081e7a0.tar.bz2 linux-ce5c5d554dc47a4fb4360c84b72231fea081e7a0.zip |
dax: expose __dax_fault for filesystems with locking constraints
Some filesystems cannot call dax_fault() directly because they have
different locking and/or allocation constraints in the page fault IO
path. To handle this, we need to follow the same model as the
generic block_page_mkwrite code, where the internals are exposed via
__block_page_mkwrite() so that filesystems can wrap the correct
locking and operations around the outside.
This is loosely based on a patch originally from Matthew Willcox.
Unlike the original patch, it does not change ext4 code, error
returns or unwritten extent conversion handling. It also adds a
__dax_mkwrite() wrapper for .page_mkwrite implementations to do the
right thing, too.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/f2fs/dir.c')
0 files changed, 0 insertions, 0 deletions