From 8c90f73d5673c9f965bdb674127ed76f83ca979c Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Sun, 19 Mar 2023 22:23:36 -0700
Subject: [PATCH] 
 shmem-open-code-the-page-cache-lookup-in-shmem_get_folio_gfp-fix

Adjust the new comment line: shmem folio may have been swapped out.

Link: https://lkml.kernel.org/r/af178ebb-1076-a38c-1dc1-2a37ccce4a3@google.com
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/shmem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index e801e978af69..e0242f9fd596 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1904,7 +1904,7 @@ repeat:
 	if (folio) {
 		folio_lock(folio);
 
-		/* Has the page been truncated? */
+		/* Has the folio been truncated or swapped out? */
 		if (unlikely(folio->mapping != mapping)) {
 			folio_unlock(folio);
 			folio_put(folio);
-- 
2.50.1