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

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Date:	Fri, 02 May 2014 19:19:49 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Yinghai Lu <yinghai@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Tony Luck <tony.luck@...el.com>
CC:	linux-kernel@...r.kernel.org, Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org
Subject: Re: [PATCH 2/8] sh, irq: Remove irq_reserve_irq calling

Hello.

On 05/02/2014 03:18 AM, 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.

> 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.

    It makes sense to convert this comment to one-liner now. I'd also have 
started it with a capital letter.

>   	 */
> -	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);

WBR, Sergei

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