linux-kernel - [PATCH v2 10/16] hostfs: Tell the VFS that readpage was synchronous

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Message-Id: <20201009143104.22673-11-willy@infradead.org>
Date:   Fri,  9 Oct 2020 15:30:58 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     linux-fsdevel@...r.kernel.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-mm@...ck.org, v9fs-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, linux-afs@...ts.infradead.org,
        ceph-devel@...r.kernel.org, linux-cifs@...r.kernel.org,
        ecryptfs@...r.kernel.org, linux-um@...ts.infradead.org,
        linux-mtd@...ts.infradead.org, Richard Weinberger <richard@....at>,
        linux-xfs@...r.kernel.org
Subject: [PATCH v2 10/16] hostfs: Tell the VFS that readpage was synchronous

The hostfs readpage implementation was already synchronous, so use
AOP_UPDATED_PAGE to avoid cycling the page lock.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Acked-by: Richard Weinberger <richard@....at>
---
 fs/hostfs/hostfs_kern.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index c070c0d8e3e9..c49221c09c4b 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -455,6 +455,8 @@ static int hostfs_readpage(struct file *file, struct page *page)
  out:
 	flush_dcache_page(page);
 	kunmap(page);
+	if (!ret)
+		return AOP_UPDATED_PAGE;
 	unlock_page(page);
 	return ret;
 }
-- 
2.28.0