Re: [PATCH 2/3] x86/fpu: Simplify kernel_fpu_begin

[Christoph Hellwig]

On Tue, Jun 04, 2019 at 01:47:01PM +0200, Peter Zijlstra wrote:
> > +	if (current->mm && !test_thread_flag(TIF_NEED_FPU_LOAD)) {
> 
> Did that want to be: !(current->flags & PF_KTHREAD), instead?
> 
> Because I'm thinking that kernel_fpu_begin() on a kthread that has
> use_mm() employed shouldn't be doing this..

Well, this is intended to not change semantics.  If we should fix
this is should be a separate patch before or after this series.