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Date: Tue, 27 Dec 2011 09:48:57 +0800 From: Li Zefan <lizf@...fujitsu.com> To: Tejun Heo <tj@...nel.org> CC: LKML <linux-kernel@...r.kernel.org>, Cgroups <cgroups@...r.kernel.org> Subject: Re: [PATCH] cgroup: move a check to parse_cgroupfs_options() Tejun Heo wrote: > Hello, > > On Thu, Dec 22, 2011 at 7:40 PM, Li Zefan <lizf@...fujitsu.com> wrote: >>> And where did this one go? >> >> The other one I removed sets opts->new_root to NULL, and this one detects >> the NULL ptr: >> >> if (!opts->subsys_bits && !opts->none) >> return NULL; >> ... >> opts->new_root = NULL; >> ... >> if (!opts->new_root) >> return -EINVAL; >> >> shortcut to: >> >> if (!opts->subsys_bits && !opts->none) >> return -EINVAL; > > Thanks for the explanation. Maybe explaining it briefly in the commit > message would be nice? > I recalled why we have this check in this place, that is to allow mounting by hierarchy name, but it has been broken for a long time. I'll send a fix with detailed changelog. -- 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/
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