From: Borislav Petkov <bp@alien8.de>
To: Christoph Hellwig <hch@lst.de>
Cc: x86@kernel.org, Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/3] x86/fpu: don't use current->mm to check for a kthread
Date: Thu, 13 Jun 2019 21:03:59 +0200 [thread overview]
Message-ID: <20190613190359.GF11598@zn.tnic> (raw)
In-Reply-To: <20190604175411.GA27477@lst.de>
On Tue, Jun 04, 2019 at 07:54:12PM +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@infradead.org>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> arch/x86/include/asm/fpu/internal.h | 6 +++---
> arch/x86/kernel/fpu/core.c | 3 ++-
> 2 files changed, 5 insertions(+), 4 deletions(-)
I had to take this one first because of the Fixes: tag and expedite it
through tip:x86/urgent. Check the tip-bot notification mail whether it
is still ok.
I'll redo the other ones ontop, or you can if you feel bored. :)
Thx.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2019-06-13 19:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 7:15 x86 fpu cleanups Christoph Hellwig
2019-06-04 7:15 ` [PATCH 1/3] x86/fpu: Simplify kernel_fpu_end Christoph Hellwig
2019-06-17 10:31 ` [tip:x86/fpu] x86/fpu: Simplify kernel_fpu_end() tip-bot for Christoph Hellwig
2019-06-04 7:15 ` [PATCH 2/3] x86/fpu: Simplify kernel_fpu_begin Christoph Hellwig
2019-06-04 11:47 ` Peter Zijlstra
2019-06-04 13:11 ` Christoph Hellwig
2019-06-04 13:34 ` Peter Zijlstra
2019-06-04 14:34 ` Christoph Hellwig
2019-06-17 10:31 ` [tip:x86/fpu] x86/fpu: Simplify kernel_fpu_begin() tip-bot for Christoph Hellwig
2019-06-04 7:15 ` [PATCH 3/3] x86/fpu: remove the fpu__save export Christoph Hellwig
2019-06-17 10:32 ` [tip:x86/fpu] x86/fpu: Remove the fpu__save() export tip-bot for Christoph Hellwig
2019-06-04 17:54 ` [PATCH 4/3] x86/fpu: don't use current->mm to check for a kthread Christoph Hellwig
2019-06-11 7:52 ` Sebastian Andrzej Siewior
2019-06-13 19:03 ` Borislav Petkov [this message]
2019-06-13 19:07 ` [tip:x86/urgent] x86/fpu: Don't " tip-bot for Christoph Hellwig
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