linux-kernel - Re: [PATCH 2/3] irq/affinity: Add is_managed into struct irq_affinity

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Date:   Tue, 18 Dec 2018 16:26:01 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Dou Liyang <douliyangs@...il.com>
cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        kashyap.desai@...adcom.com,
        shivasharan.srikanteshwara@...adcom.com, sumit.saxena@...adcom.com,
        ming.lei@...hat.com, hch@....de, bhelgaas@...gle.com,
        douliyang1@...wei.com
Subject: Re: [PATCH 2/3] irq/affinity: Add is_managed into struct
 irq_affinity_desc

On Tue, 4 Dec 2018, Dou Liyang wrote:
> diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
> index 1562a36e7c0f..d122575ba1b4 100644
> --- a/kernel/irq/affinity.c
> +++ b/kernel/irq/affinity.c
> @@ -289,6 +289,13 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
>  	for (; curvec < nvecs; curvec++)
>  		cpumask_copy(&masks[curvec].mask, irq_default_affinity);
>  
> +	/*  Setup complementary information */
> +	for (i = 0; i < nvecs; i++) {
> +		if (i >= affd->pre_vectors && i < nvecs - affd->post_vectors)
> +			masks[i].is_managed = 1;
> +		else
> +			masks[i].is_managed = 0;

Why want you clear the bit? The masks are allocated with kcalloc() so it's
clear already.

+	/* Mark the managed interrupts */
+	for (i = affd->pre_vectors; i < nvecs - affd->post_vectors; i++)
+		masks[i].is_managed = 1;
+

Is what I made it instead.

Thanks,

	tglx