From: Kairui Song <kasong@tencent.com>

folio_index is only needed for mixed usage of page cache and swap
cache, for pure page cache usage, the caller can just use
folio->index instead.

It can't be a swap cache folio here.  Swap mapping may only call into fs
through `swap_rw` but fuse does not use that method for SWAP.

Signed-off-by: Kairui Song <kasong@tencent.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Joanne Koong <joannelkoong@gmail.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/fuse/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 754378dd9f71..6f19a4daa559 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -487,7 +487,7 @@ static inline bool fuse_folio_is_writeback(struct inode *inode,
 					   struct folio *folio)
 {
 	pgoff_t last = folio_next_index(folio) - 1;
-	return fuse_range_is_writeback(inode, folio_index(folio), last);
+	return fuse_range_is_writeback(inode, folio->index, last);
 }
 
 static void fuse_wait_on_folio_writeback(struct inode *inode,
@@ -2349,7 +2349,7 @@ static bool fuse_writepage_need_send(struct fuse_conn *fc, struct folio *folio,
 		return true;
 
 	/* Discontinuity */
-	if (data->orig_folios[ap->num_folios - 1]->index + 1 != folio_index(folio))
+	if (data->orig_folios[ap->num_folios - 1]->index + 1 != folio->index)
 		return true;
 
 	/* Need to grow the pages array?  If so, did the expansion fail? */
-- 
2.49.0