btrfs: use pgoff_t for page index variables

Any conversion of offsets in the logical or the physical mapping space
of the pages is done by a shift and the target type should be pgoff_t
(type of struct page::index). Fix the locations where it's still
unsigned long.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 247676f34f2e..05b046c6806f 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -856,7 +856,7 @@ static noinline int prepare_one_folio(struct inode *inode, struct folio **folio_
 				      loff_t pos, size_t write_bytes,
 				      bool nowait)
 {
-	unsigned long index = pos >> PAGE_SHIFT;
+	const pgoff_t index = pos >> PAGE_SHIFT;
 	gfp_t mask = get_prepare_gfp_flags(inode, nowait);
 	fgf_t fgp_flags = (nowait ? FGP_WRITEBEGIN | FGP_NOWAIT : FGP_WRITEBEGIN) |
 			  fgf_set_order(write_bytes);