Re: [PATCH] x86/fpu: drop_fpu() should not assume that tsk == current
From: Oleg Nesterov
Date: Mon Mar 09 2015 - 14:08:58 EST
On 03/09, Borislav Petkov wrote:
> On Mon, Mar 09, 2015 at 06:10:41PM +0100, Oleg Nesterov wrote:
> > drop_fpu() does clear_used_math() and usually this is correct because
> > tsk == current. However switch_fpu_finish()->restore_fpu_checking() is
> > called before it updates the "current_task" variable. If it fails, we
> You mean here "... before __switch_to() updates the current_task ... ",
> I assume?
Yes... should I resend?
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