linux-ext4 - [PATCH 3/4] 9pfs: Fix filesystem to wait for stable page writeback

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Message-ID: <20121213080802.23360.4487.stgit@blackbox.djwong.org>
Date:	Thu, 13 Dec 2012 00:08:02 -0800
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	axboe@...nel.dk, lucho@...kov.net, jack@...e.cz,
	"Darrick J. Wong" <darrick.wong@...cle.com>, ericvh@...il.com,
	viro@...iv.linux.org.uk, rminnich@...dia.gov, tytso@....edu
Cc:	martin.petersen@...cle.com, neilb@...e.de, david@...morbit.com,
	Zheng Liu <gnehzuil.liu@...il.com>,
	linux-kernel@...r.kernel.org, hch@...radead.org,
	linux-fsdevel@...r.kernel.org, adilger.kernel@...ger.ca,
	bharrosh@...asas.com, jlayton@...ba.org,
	v9fs-developer@...ts.sourceforge.net, linux-ext4@...r.kernel.org
Subject: [PATCH 3/4] 9pfs: Fix filesystem to wait for stable page writeback

Fix up the ->page_mkwrite handler to provide stable page writes if necessary.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
 fs/9p/vfs_file.c |    1 +
 1 file changed, 1 insertion(+)


diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index c2483e9..357260b 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -620,6 +620,7 @@ v9fs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	lock_page(page);
 	if (page->mapping != inode->i_mapping)
 		goto out_unlock;
+	wait_for_stable_page(page);
 
 	return VM_FAULT_LOCKED;
 out_unlock:

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