Re: [PATCH 01/14] sysctl: provide callback for write into ctl_table entry

[Steven Rostedt <rostedt@xxxxxxxxxxx>]

On Sun, 2012-04-29 at 14:07 +0200, Sasha Levin wrote:
> On Sun, Apr 29, 2012 at 10:22 AM, Eric W. Biederman

> Exactly twp of the patches (out of 14) are taking updates out of
> locks. I'm quite sure that doing that in the ftrace case is perfectly
> fine, and I'll take a second look at the sched-rt one since there
> indeed might be a race caused due to the patch that I've missed.

The update of ftrace_enable must be done under the ftrace_lock mutex.
With the exception of ftrace_kill() which is a one shot deal that kills
ftrace updates until a reboot.

-- Steve


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