linux-kernel - Re: [PATCH] cgroup: remove redundant variable in cgroup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20140920171231.GB3681@htj.dyndns.org>
Date:	Sat, 20 Sep 2014 13:12:31 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Zefan Li <lizefan@...wei.com>
Cc:	Cgroups <cgroups@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cgroup: remove redundant variable in cgroup_mount()

Hello, Li.

On Sat, Sep 20, 2014 at 02:49:10PM +0800, Zefan Li wrote:
> Both pinned_sb and new_sb indicate if a new superblock is needed,
> so we can just remove new_sb.
> 
> Note now we must check if kernfs_tryget_sb() returns NULL, because
> when it returns NULL, kernfs_mount() may still re-use an existing
> superblock, which is just allocated by another concurent mount.
> 
> Suggested-by: Tejun Heo <tj@...nel.org>
> Signed-off-by: Zefan Li <lizefan@...wei.com>

Ah, this is so much better.  Thanks for doing this.  Applied to
cgroup/for-3.18.

> ---
> 
> Hi Tejun,
> 
> I think you wanted to see the @new_sb argument removed from kernfs_mount(),
> but it's also used in debugfs and we can't use kernfs_tryget_sb() to
> replace the new_sb check.

Bummer, someday. :)

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/