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From: Thomas Gleixner <tglx@linutronix.de>
To: David Woodhouse <dwmw2@infradead.org>, x86@kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	iommu <iommu@lists.linux-foundation.org>,
	linux-hyperv@vger.kernel.org, kvm <kvm@vger.kernel.org>
Subject: Re: [PATCH 05/13] genirq: Prepare for default affinity to be passed to __irq_alloc_descs()
Date: Tue, 06 Oct 2020 23:01:18 +0200	[thread overview]
Message-ID: <87r1qb5ash.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20201005152856.974112-5-dwmw2@infradead.org>

On Mon, Oct 05 2020 at 16:28, David Woodhouse wrote:
>  
>  #else /* CONFIG_SMP */
>  
> +#define irq_default_affinity (NULL)

...

>  static int alloc_descs(unsigned int start, unsigned int cnt, int node,
>  		       const struct irq_affinity_desc *affinity,
> +		       const struct cpumask *default_affinity,
>  		       struct module *owner)
>  {
>  	struct irq_desc *desc;
>  	int i;
>  
>  	/* Validate affinity mask(s) */
> +	if (!default_affinity || cpumask_empty(default_affinity))
> +		return -EINVAL;

How is that supposed to work on UP?

Aside of that I really hate to have yet another argument just
because.

Thanks,

        tglx
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  reply	other threads:[~2020-10-06 21:01 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-05 15:28 [PATCH 0/13] Fix per-domain IRQ affinity, allow >255 CPUs on x86 without IRQ remapping David Woodhouse
2020-10-05 15:28 ` [PATCH 01/13] x86/apic: Use x2apic in guest kernels even with unusable CPUs David Woodhouse
2020-10-05 15:28   ` [PATCH 02/13] x86/msi: Only use high bits of MSI address for DMAR unit David Woodhouse
2020-10-06 20:45     ` Thomas Gleixner
2020-10-05 15:28   ` [PATCH 03/13] x86/ioapic: Handle Extended Destination ID field in RTE David Woodhouse
2020-10-05 15:28   ` [PATCH 04/13] x86/apic: Support 15 bits of APIC ID in IOAPIC/MSI where available David Woodhouse
2020-10-05 15:28   ` [PATCH 05/13] genirq: Prepare for default affinity to be passed to __irq_alloc_descs() David Woodhouse
2020-10-06 21:01     ` Thomas Gleixner [this message]
2020-10-06 21:07       ` David Woodhouse
2020-10-05 15:28   ` [PATCH 06/13] genirq: Add default_affinity argument " David Woodhouse
2020-10-06 21:06     ` Thomas Gleixner
2020-10-05 15:28   ` [PATCH 07/13] irqdomain: Add max_affinity argument to irq_domain_alloc_descs() David Woodhouse
2020-10-06 21:26     ` Thomas Gleixner
2020-10-07  7:19       ` David Woodhouse
2020-10-07 13:37         ` Thomas Gleixner
2020-10-07 14:10           ` David Woodhouse
2020-10-07 15:57             ` Thomas Gleixner
2020-10-07 16:11               ` David Woodhouse
2020-10-07 20:53                 ` Thomas Gleixner
2020-10-08  7:21               ` David Woodhouse
2020-10-08  9:34                 ` Thomas Gleixner
2020-10-08 11:10                   ` David Woodhouse
2020-10-08 12:40                     ` Thomas Gleixner
2020-10-09  7:54                       ` David Woodhouse
2020-10-05 15:28   ` [PATCH 08/13] genirq: Add irq_domain_set_affinity() David Woodhouse
2020-10-06 21:32     ` Thomas Gleixner
2020-10-07  7:22       ` David Woodhouse
2020-10-05 15:28   ` [PATCH 09/13] x86/irq: Add x86_non_ir_cpumask David Woodhouse
2020-10-06 21:42     ` Thomas Gleixner
2020-10-07  7:25       ` David Woodhouse
2020-10-05 15:28   ` [PATCH 10/13] x86/irq: Limit IOAPIC and MSI domains' affinity without IR David Woodhouse
2020-10-06 21:54     ` Thomas Gleixner
2020-10-07  7:48       ` David Woodhouse
2020-10-07 12:59         ` Thomas Gleixner
2020-10-07 13:08           ` David Woodhouse
2020-10-07 14:05             ` Thomas Gleixner
2020-10-07 14:23               ` David Woodhouse
2020-10-07 16:02                 ` Thomas Gleixner
2020-10-07 16:15                   ` David Woodhouse
2020-10-07 15:05               ` David Woodhouse
2020-10-07 15:25                 ` Thomas Gleixner
2020-10-07 15:46                   ` David Woodhouse
2020-10-07 17:23                     ` Thomas Gleixner
2020-10-07 17:34                       ` David Woodhouse
2020-10-05 15:28   ` [PATCH 11/13] x86/smp: Allow more than 255 CPUs even without interrupt remapping David Woodhouse
2020-10-05 15:28   ` [PATCH 12/13] iommu/irq_remapping: Kill most of hyperv-iommu.c now it's redundant David Woodhouse
2020-10-05 15:28   ` [PATCH 13/13] x86/kvm: Add KVM_FEATURE_MSI_EXT_DEST_ID David Woodhouse
2020-10-07  8:14     ` Paolo Bonzini
2020-10-07  8:59       ` David Woodhouse
2020-10-07 11:15         ` Paolo Bonzini
2020-10-07 12:04           ` David Woodhouse

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