From:   Luis Chamberlain <mcgrof@kernel.org>
To:     hughd@google.com, akpm@linux-foundation.org, willy@infradead.org,
        brauner@kernel.org
Cc:     linux-mm@kvack.org, p.raghav@samsung.com, da.gomez@samsung.com,
        a.manzanares@samsung.com, dave@stgolabs.net, yosryahmed@google.com,
        keescook@chromium.org, mcgrof@kernel.org, patches@lists.linux.dev,
        linux-kernel@vger.kernel.org, David Hildenbrand <david@redhat.com>
Subject: [PATCH v2 1/6] shmem: remove check for folio lock on writepage()
Date:   Thu,  9 Mar 2023 15:05:40 -0800
Message-Id: <20230309230545.2930737-2-mcgrof@kernel.org>
In-Reply-To: <20230309230545.2930737-1-mcgrof@kernel.org>
References: <20230309230545.2930737-1-mcgrof@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: Luis Chamberlain <mcgrof@infradead.org>
Precedence: bulk

Matthew notes we should not need to check the folio lock
on the writepage() callback so remove it. This sanity check
has been lingering since linux-history days. We remove this
as we tidy up the writepage() callback to make things a bit
clearer.

Suggested-by: Matthew Wilcox <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 mm/shmem.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 1af85259b6fc..7fff1a3af092 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1354,7 +1354,6 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
 		folio_clear_dirty(folio);
 	}
 
-	BUG_ON(!folio_test_locked(folio));
 	mapping = folio->mapping;
 	index = folio->index;
 	inode = mapping->host;
-- 
2.39.1