linux-kernel - Re: [PATCH] vfs: use kstrdup()

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Message-ID: <20080719131317.GA7027@asus>
Date:	Sat, 19 Jul 2008 17:13:17 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] vfs: use kstrdup()

[Li Zefan - Sat, Jul 19, 2008 at 06:16:20PM +0800]
| This piece of code can be replaced by a kstrdup().
| 
| Signed-off-by: Li Zefan <lizf@...fujitsu.com>
| ---
|  fs/namespace.c |    9 +--------
|  1 files changed, 1 insertions(+), 8 deletions(-)
| 
| diff --git a/fs/namespace.c b/fs/namespace.c
| index 4f6f763..08c3b2d 100644
| --- a/fs/namespace.c
| +++ b/fs/namespace.c
| @@ -127,14 +127,7 @@ struct vfsmount *alloc_vfsmnt(const char *name)
|  		INIT_LIST_HEAD(&mnt->mnt_slave_list);
|  		INIT_LIST_HEAD(&mnt->mnt_slave);
|  		atomic_set(&mnt->__mnt_writers, 0);
| -		if (name) {
| -			int size = strlen(name) + 1;
| -			char *newname = kmalloc(size, GFP_KERNEL);
| -			if (newname) {
| -				memcpy(newname, name, size);
| -				mnt->mnt_devname = newname;
| -			}
| -		}
| +		mnt->mnt_devname = kstrdup(name, GFP_KERNEL);
|  	}
|  	return mnt;
|  }
| -- 
| 1.5.4.rc3
| 
| 

but kstrdup may return NULL - is it safe there?
Sorry if that "not smart" question.

		- Cyrill -
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