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SubjectRe: [PATCH 6/9] sparc/perf: correctly check for kthreads
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From: Mark Rutland <mark.rutland@arm.com>
Date: Wed, 14 Aug 2019 11:41:28 +0100

> The sparc perf_callchain_user() functions looks at current->mm,
> apparently to determine whether the thread is a kthread without any
> valid user context.
>
> 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.rutland@arm.com>

Acked-by: David S. Miller <davem@davemloft.net>

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