linux-kernel - [PATCH 7/9] Unionfs: remove unnecessary lower atime updates

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Date:	Tue, 13 Nov 2007 05:10:26 -0500
From:	Erez Zadok <ezk@...sunysb.edu>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	viro@....linux.org.uk, hch@...radead.org,
	Erez Zadok <ezk@...sunysb.edu>
Subject: [PATCH 7/9] Unionfs: remove unnecessary lower atime updates

No need for this because our readpage calls vfs_read on the lower objects,
which would update the atime as/if needed.

Signed-off-by: Erez Zadok <ezk@...sunysb.edu>
---
 fs/unionfs/file.c |    8 --------
 fs/unionfs/mmap.c |    6 ------
 2 files changed, 0 insertions(+), 14 deletions(-)

diff --git a/fs/unionfs/file.c b/fs/unionfs/file.c
index 126df5e..809e0f1 100644
--- a/fs/unionfs/file.c
+++ b/fs/unionfs/file.c
@@ -31,10 +31,6 @@ static ssize_t unionfs_read(struct file *file, char __user *buf,
 
 	err = do_sync_read(file, buf, count, ppos);
 
-	if (err >= 0)
-		touch_atime(unionfs_lower_mnt(file->f_path.dentry),
-			    unionfs_lower_dentry(file->f_path.dentry));
-
 out:
 	unionfs_read_unlock(file->f_path.dentry->d_sb);
 	unionfs_check_file(file);
@@ -58,10 +54,6 @@ static ssize_t unionfs_aio_read(struct kiocb *iocb, const struct iovec *iov,
 	if (err == -EIOCBQUEUED)
 		err = wait_on_sync_kiocb(iocb);
 
-	if (err >= 0)
-		touch_atime(unionfs_lower_mnt(file->f_path.dentry),
-			    unionfs_lower_dentry(file->f_path.dentry));
-
 out:
 	unionfs_read_unlock(file->f_path.dentry->d_sb);
 	unionfs_check_file(file);
diff --git a/fs/unionfs/mmap.c b/fs/unionfs/mmap.c
index bb00fd5..34fd8aa 100644
--- a/fs/unionfs/mmap.c
+++ b/fs/unionfs/mmap.c
@@ -212,12 +212,6 @@ static int unionfs_readpage(struct file *file, struct page *page)
 
 	err = unionfs_do_readpage(file, page);
 
-	if (!err) {
-		touch_atime(unionfs_lower_mnt(file->f_path.dentry),
-			    unionfs_lower_dentry(file->f_path.dentry));
-		unionfs_copy_attr_times(file->f_path.dentry->d_inode);
-	}
-
 	/*
 	 * we have to unlock our page, b/c we _might_ have gotten a locked
 	 * page.  but we no longer have to wakeup on our page here, b/c
-- 
1.5.2.2

-
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