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>

diff --git a/mm/shmem.c b/mm/shmem.c
index e801e978af69d229306161fdf04277368bddaafa..e0242f9fd5969ffda0e53498b3253511b236e18e 100644 (file)
--- 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);