linux-kernel - Re: [PATCH 2/8] sh, irq: Remove irq_reserve

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Date:	Fri, 2 May 2014 11:38:47 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Tony Luck <tony.luck@...el.com>,
	linux-kernel@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>,
	linux-sh@...r.kernel.org
Subject: Re: [PATCH 2/8] sh, irq: Remove irq_reserve_irq calling

On Thu, May 01, 2014 at 04:18:16PM -0700, Yinghai Lu wrote:
> in sh calling path:
> 	register_intc_controller
> 		==> irq_create_identity_mapping/irq_create_strict_mappins
> 			==>irq_alloc_desc: it will set bits on allocate_irq
> 		==> intc_register_irq
> 			==> irq_reserve_irq: set bits again
> 
> so we can kill this irq_reserve_irq calling.

Thanks, this looks fine to me.

As the file in question has not been updated in well over a year
and I'm not aware of any other outstanding updates to it I think
that the chance of conflicts is low. With that in mind I'm happy
for whoever takes the reset of this series to take this patch too.

Acked-by: Simon Horman <horms+renesas@...ge.net.au>

> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> Cc: Simon Horman <horms@...ge.net.au>
> Cc: Magnus Damm <magnus.damm@...il.com>
> Cc: linux-sh@...r.kernel.org
> ---
>  drivers/sh/intc/core.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c
> index 8f32a13..05118f92 100644
> --- a/drivers/sh/intc/core.c
> +++ b/drivers/sh/intc/core.c
> @@ -81,11 +81,8 @@ static void __init intc_register_irq(struct intc_desc *desc,
>  	unsigned long flags;
>  
>  	/*
> -	 * Register the IRQ position with the global IRQ map, then insert
> -	 * it in to the radix tree.
> +	 * insert it in to the radix tree.
>  	 */
> -	irq_reserve_irq(irq);
> -
>  	raw_spin_lock_irqsave(&intc_big_lock, flags);
>  	radix_tree_insert(&d->tree, enum_id, intc_irq_xlate_get(irq));
>  	raw_spin_unlock_irqrestore(&intc_big_lock, flags);
> -- 
> 1.8.4.5
> 
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