buffer: convert block_truncate_page() to use a folio

Support large folios in block_truncate_page() and avoid three hidden calls
to compound_head().

[[email protected]: fix check of filemap_grab_folio() return value]
  Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Cc: Andreas Gruenbacher <[email protected]>
Cc: Bob Peterson <[email protected]>
Cc: Hannes Reinecke <[email protected]>
Cc: Luis Chamberlain <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions