Re: [PATCH 4/3] x86/fpu: don't use current->mm to check for a kthread

From: Sebastian Andrzej Siewior
Date: Tue Jun 11 2019 - 03:57:09 EST

On 2019-06-04 19:54:12 [+0200], Christoph Hellwig wrote:
> current->mm can be non-NULL if a kthread calls use_mm. Check for
> PF_KTHREAD instead to decide when to store user mode FP state.
> Fixes: 2722146eb784 ("x86/fpu: Remove fpu->initialized")
> Reported-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Acked-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>

For the whole series.