On Wed, Aug 14, 2019 at 11:41:27AM +0100, Mark Rutland wrote: > Since commit: > > 6eb6c80187c55b7f ("arm64: kernel thread don't need to save fpsimd context.") > > ... we skip saving the fpsimd state for kernel threads in > arch_dup_task_struct(). We determine whether current is a kthread by > looking at current->mm. > > In general, a non-NULL current->mm doesn't imply that current is a > kthread, as kthreads can install an mm via use_mm(), and so it's > preferable to use is_kthread() to determine whether a thread is a > kthread. > > For consistency, let's use is_kthread() here. > > Signed-off-by: Mark Rutland <mark.rutl...@arm.com> > Cc: Catalin Marinas <catalin.mari...@arm.com> > Cc: Ingo Molnar <mi...@kernel.org> > Cc: Peter Zijlstra <pet...@infradead.org> > Cc: Will Deacon <w...@kernel.org>
Acked-by: Catalin Marinas <catalin.mari...@arm.com>