linux-kernel - [RFC PATCH 30/35] netfs: Make netfs_page_mkwrite() use folio_mkwrite_check

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Message-ID: <20250313233341.1675324-31-dhowells@redhat.com>
Date: Thu, 13 Mar 2025 23:33:22 +0000
From: David Howells <dhowells@...hat.com>
To: Viacheslav Dubeyko <slava@...eyko.com>,
	Alex Markuze <amarkuze@...hat.com>
Cc: David Howells <dhowells@...hat.com>,
	Ilya Dryomov <idryomov@...il.com>,
	Jeff Layton <jlayton@...nel.org>,
	Dongsheng Yang <dongsheng.yang@...ystack.cn>,
	ceph-devel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 30/35] netfs: Make netfs_page_mkwrite() use folio_mkwrite_check_truncate()

Make netfs_page_mkwrite() use folio_mkwrite_check_truncate() rather than
doing the checks itself (and it doesn't currently do all the checks).

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Jeff Layton <jlayton@...nel.org>
cc: Viacheslav Dubeyko <slava@...eyko.com>
cc: Alex Markuze <amarkuze@...hat.com>
cc: Ilya Dryomov <idryomov@...il.com>
cc: ceph-devel@...r.kernel.org
cc: linux-fsdevel@...r.kernel.org
---
 fs/netfs/buffered_write.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index 12ddbe9bc78b..64a0f0620399 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -506,7 +506,7 @@ vm_fault_t netfs_page_mkwrite(struct vm_fault *vmf, struct netfs_group *netfs_gr
 
 	if (folio_lock_killable(folio) < 0)
 		goto out;
-	if (folio->mapping != mapping)
+	if (folio_mkwrite_check_truncate(folio, inode) < 0)
 		goto unlock;
 	if (folio_wait_writeback_killable(folio) < 0)
 		goto unlock;