linux-kernel - [PATCH 09/21] bfs: drop vmtruncate

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Message-ID: <50829713.30700@gmail.com>
Date:	Sat, 20 Oct 2012 14:20:35 +0200
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Linux FS Devel <linux-fsdevel@...r.kernel.org>
CC:	"Tigran A. Aivazian" <tigran@...azian.fsnet.co.uk>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 09/21] bfs: drop vmtruncate

Removed vmtruncate

Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
---
 fs/bfs/file.c |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index f20e8a7..ad3ea14 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -161,6 +161,14 @@ static int bfs_readpage(struct file *file, struct page *page)
 	return block_read_full_page(page, bfs_get_block);
 }
 
+static void bfs_write_failed(struct address_space *mapping, loff_t to)
+{
+	struct inode *inode = mapping->host;
+
+	if (to > inode->i_size)
+		truncate_pagecache(inode, to, inode->i_size);
+}
+
 static int bfs_write_begin(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned flags,
 			struct page **pagep, void **fsdata)
@@ -169,11 +177,8 @@ static int bfs_write_begin(struct file *file, struct address_space *mapping,
 
 	ret = block_write_begin(mapping, pos, len, flags, pagep,
 				bfs_get_block);
-	if (unlikely(ret)) {
-		loff_t isize = mapping->host->i_size;
-		if (pos + len > isize)
-			vmtruncate(mapping->host, isize);
-	}
+	if (unlikely(ret))
+		bfs_write_failed(mapping, pos + len);
 
 	return ret;
 }
-- 
1.7.3.4
--
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