linux-kernel - Re: [PATCH] __set_page_dirty uses spin_lock_irqsave instead of spin_lock

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Message-ID: <CAHGf_=qdtQsxE3vYcmUgSre=MiTd7ycYSFCeiTGD2z7b+eE36A@mail.gmail.com>
Date:	Tue, 4 Feb 2014 12:02:29 -0500
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Subject: Re: [PATCH] __set_page_dirty uses spin_lock_irqsave instead of spin_lock_irq

On Tue, Feb 4, 2014 at 11:58 AM,  <kosaki.motohiro@...il.com> wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
>
> To use spin_{un}lock_irq is dangerous if caller disabled interrupt.
> spin_lock_irqsave is a safer alternative. Luckily, now there is no
> caller that has such usage but it would be nice to fix.
>
> Reported-by: David Rientjes rientjes@...gle.com>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

Self Nack this. There IS a caller and we should send this to stable.
I'll respin.
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