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Date: Tue, 24 Aug 2010 14:11:09 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Yong Zhang <yong.zhang0@gmail.com>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
        akpm@linux-foundation.org, mingo@elte.hu, peterz@infradead.org
Subject: Re: [RFC PATCH 1/3] timer: fix comments of try_to_del_timer_sync()
Message-ID: <20100824121109.GA13061@redhat.com>
References: <1282633129-9187-1-git-send-email-yong.zhang0@gmail.com> <1282633129-9187-2-git-send-email-yong.zhang0@gmail.com>
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On 08/24, Yong Zhang wrote:
>
> From: Yong Zhang <yong.zhang@windriver.com>
>
> In commit fd450b7318b75343fd76b3d95416853e34e72c95, it was saying
> try_to_del_timer_sync() can be used in interrupt context.

Yes, but not in UP case.

Please remove "#ifdef CONFIG_SMP" from set_running_timer(), then iirc
it can be used from irq.

Oleg.