linux-kernel - Re: [PATCH 2.6.24-rt1] SMC91x: Use special_lock when CONFIG_PREEMPT

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Message-id: <alpine.LFD.1.00.0802140902460.2732@xanadu.home>
Date:	Thu, 14 Feb 2008 09:03:09 -0500 (EST)
From:	Nicolas Pitre <nico@....org>
To:	Kevin Hilman <khilman@...sta.com>
Cc:	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.24-rt1] SMC91x: Use special_lock when
 CONFIG_PREEMPT_[HARD|SOFT]IRQS

On Wed, 13 Feb 2008, Kevin Hilman wrote:

> The smc_special_locks should also be used when either softIRQs or hard
> IRQs are preempted which may lead to the same problems as under SMP.
> 
> Signed-off-by: Kevin Hilman <khilman@...sta.com>

Acked-by: Nicolas Pitre <nico@....org>

> 
> ---
>  drivers/net/smc91x.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/net/smc91x.c b/drivers/net/smc91x.c
> index f198c49..be62616 100644
> --- a/drivers/net/smc91x.c
> +++ b/drivers/net/smc91x.c
> @@ -530,7 +530,8 @@ static inline void  smc_rcv(struct net_device *dev)
>  	}
>  }
>  
> -#ifdef CONFIG_SMP
> +#if defined(CONFIG_SMP) ||						\
> +    defined(CONFIG_PREEMPT_SOFTIRQS) || defined(CONFIG_PREEMPT_HARDIRQS)
>  /*
>   * On SMP we have the following problem:
>   *
> -- 
> 1.5.4
> 
> --
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Nicolas
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