Merge patch series "Orangefs fixes for 6.15"

Matthew Wilcox (Oracle) <willy@infradead.org> says:

The start of this was the removal of orangefs_writepage(), but it quickly
spiralled into a more comprehensive cleanup.  The first patch is an
actual bug fix.  I haven't tagged it for backport, as I don't think we
really care about 32-bit systems any more, but feel free to add a cc to
stable if you disagree.

Patches 2 and 3 are compilation fixes for warnings which aren't enabled
by default.

Patches 4-9 are improvements which simplify orangefs or convert it
from pages to folios.  There is still a little use of 'struct page'
in orangefs, but it's not in the areas that deal with the page cache.

* patches from https://lore.kernel.org/r/20250305204734.1475264-1-willy@infradead.org:
  orangefs: Convert orangefs_writepages to contain an array of folios
  orangefs: Simplify bvec setup in orangefs_writepages_work()
  orangefs: Unify error & success paths in orangefs_writepages_work()
  orangefs: Pass mapping to orangefs_writepages_work()
  orangefs: Convert orangefs_writepage_locked() to take a folio
  orangefs: Remove orangefs_writepage()
  orangefs: make open_for_read and open_for_write boolean
  orangefs: Move s_kmod_keyword_mask_map to orangefs-debugfs.c
  orangefs: Do not truncate file size

Link: https://lore.kernel.org/r/20250305204734.1475264-1-willy@infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>