linux-kernel - Re: [PATCH v2 2/4] ARCv2: IRQ: Remove option for setting number of interrupts

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Message-ID: <ed50236e-a209-56be-e180-f03a0a24120d@synopsys.com>
Date:   Tue, 31 Jan 2017 09:40:51 -0800
From:   Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:     Yuriy Kolerov <yuriy.kolerov@...opsys.com>,
        <linux-snps-arc@...ts.infradead.org>
CC:     <marc.zyngier@....com>, <Alexey.Brodkin@...opsys.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] ARCv2: IRQ: Remove option for setting number of
 interrupts

On 01/31/2017 03:45 AM, Yuriy Kolerov wrote:
> When you set a value of ARC_NUMBER_OF_INTERRUPTS option
> it affects only a size of the interrupts table but macros
> for number of virtual interrupts (NR_IRQS) and for number
> of hardware interrupts (NR_CPU_IRQS) remain unchanged.
> Moreover usage of ARC_NUMBER_OF_INTERRUPTS is bad for
> portability since it is not possible to change size
> of the interrupts table after linkage.
> 
> This patch makes these changes in IRQ subsystem:
> 
>   * NR_CPU_IRQS defines a maximum number of hardware interrupts.
>   * Remove ARC_NUMBER_OF_INTERRUPTS option and create interrupts
>     table for all possible hardware interrupts.
>   * Increase a maximum number of virtual IRQs to 512. ARCv2 can
>     support 240 interrupts in the core interrupts controllers
>     and 128 interrupts in IDU. Thus 512 virtual IRQs must be
>     enough for most configurations of boards.
> 
> Signed-off-by: Yuriy Kolerov <yuriy.kolerov@...opsys.com>

Applied to for-next.

Thx,
-Vineet