orangefs: use folio_pos() and folio_size() in orangefs_page_mkwrite()

orangefs_page_mkwrite() records the faulted range with
page_offset(vmf->page) and PAGE_SIZE, although the write range it sets
is attached to the folio and the rest of the function already operates
on folios. Use folio_pos() and folio_size() instead. This gets rid of
two calls to page_offset(), removing two calls to compound_head().

No functional change. orangefs folios are always order-0, so the values
are identical. However, if orangefs ever enables large folios, this
change is necessary for correctness with the current write range
tracking scheme. Tracking only a single page of a larger folio would
leave the rest of the folio's dirty data outside the range that gets
written back, leading to data loss.

Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>

0 files changed, 0 insertions, 0 deletions