linux-ext4 - [PATCH 1/7] mm: don't look at xarray value entries in split_huge_pages_in

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230307143410.28031-2-hch@lst.de>
Date:   Tue,  7 Mar 2023 15:34:04 +0100
From:   Christoph Hellwig <hch@....de>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Hugh Dickins <hughd@...gle.com>
Cc:     linux-afs@...ts.infradead.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, cluster-devel@...hat.com,
        linux-mm@...ck.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-nilfs@...r.kernel.org
Subject: [PATCH 1/7] mm: don't look at xarray value entries in split_huge_pages_in_file

split_huge_pages_in_file never wants to do anything with the special
value enties.  Switch to using filemap_get_folio to not even see them.

Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 mm/huge_memory.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 4fc43859e59a31..62843afeb7946d 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3090,11 +3090,10 @@ static int split_huge_pages_in_file(const char *file_path, pgoff_t off_start,
 	mapping = candidate->f_mapping;
 
 	for (index = off_start; index < off_end; index += nr_pages) {
-		struct folio *folio = __filemap_get_folio(mapping, index,
-						FGP_ENTRY, 0);
+		struct folio *folio = filemap_get_folio(mapping, index);
 
 		nr_pages = 1;
-		if (xa_is_value(folio) || !folio)
+		if (!folio)
 			continue;
 
 		if (!folio_test_large(folio))
-- 
2.39.1