From: Joel Becker <Joel.Becker@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] ocfs2: question about dlmfs_file_read()
Date: Fri, 23 Apr 2010 13:50:37 -0700 [thread overview]
Message-ID: <20100423205037.GC10637@mail.oracle.com> (raw)
In-Reply-To: <20100418193201.GD7920@bicker>
On Sun, Apr 18, 2010 at 10:32:01PM +0300, Dan Carpenter wrote:
> Hello list,
>
> I was looking through the code for something unrelated and I got
> confused by this.
>
> fs/ocfs2/dlmfs/dlmfs.c dlmfs_file_read()
> 261 /* don't read past the lvb */
> 262 if ((count + *ppos) > i_size_read(inode))
> 263 readlen = i_size_read(inode) - *ppos;
> 264 else
> 265 readlen = count - *ppos;
>
> Shouldn't "readlen" just be "count" here? What prevents it from
> being a negative number?
>
> 266
> 267 lvb_buf = kmalloc(readlen, GFP_NOFS);
>
> Anyway, this code has been around for a long time so I'm probably
> missing something. I was just curious.
No, I think you're right. Mark, Sunil, anyone?
Joel
--
Life's Little Instruction Book #510
"Count your blessings."
Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2010-04-23 20:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-18 19:32 [Ocfs2-devel] ocfs2: question about dlmfs_file_read() Dan Carpenter
2010-04-23 20:50 ` Joel Becker [this message]
2010-04-23 22:06 ` Sunil Mushran
2010-04-23 22:27 ` Joel Becker
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