xfs: add ->pfn_mkwrite support for DAX

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->pfn_mkwrite support is needed so that when a page with allocated
backing store takes a write fault we can check that the fault has
not raced with a truncate and is pointing to a region beyond the
current end of file.

This also allows us to update the timestamp on the inode, too, which
fixes a generic/080 failure.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Dave Chinner 2015-11-03 12:37:02 +11:00 • committed by Dave Chinner

parent 01a155e6cf

commit 3af4928585

2 changed files with 36 additions and 0 deletions

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35

fs/xfs/xfs_file.c

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1

fs/xfs/xfs_trace.h

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