linux-kernel - Re: [patch 32/55] x86/irq: Restructure fixup

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Date:   Tue, 20 Jun 2017 17:34:48 -0400
From:   Keith Busch <keith.busch@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Christoph Hellwig <hch@....de>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [patch 32/55] x86/irq: Restructure fixup_irqs()

On Tue, Jun 20, 2017 at 01:37:32AM +0200, Thomas Gleixner wrote:
> @@ -441,18 +440,27 @@ void fixup_irqs(void)
>  
>  	for_each_irq_desc(irq, desc) {
>  		const struct cpumask *affinity;
> -		int break_affinity = 0;
> -		int set_affinity = 1;
> +		bool break_affinity = false;
>  
>  		if (!desc)
>  			continue;
> -		if (irq == 2)
> -			continue;
>  
>  		/* interrupt's are disabled at this point */
>  		raw_spin_lock(&desc->lock);
>  
>  		data = irq_desc_get_irq_data(desc);
> +		chip = irq_data_get_irq_chip(data);
> +		/*
> +		 * The interrupt descriptor might have been cleaned up
> +		 * already, but it is not yet removed from the radix
> +		 * tree. If the chip does not have an affinity setter,
> +		 * nothing to do here.
> +		 */
> +		if (!chip !chip->irq_set_affinity) {
> +			raw_spin_unlock(&desc->lock);
> +			continue;
> +		}

A bit of a moot point since the very next patch deletes all of this,
but found this broken 'if' condition when compiling one at a time,
missing the '&&'.