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From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Paul Cercueil <paul@crapouillou.net>
Cc: "Maciej W . Rozycki" <macro@linux-mips.org>,
	Paul Burton <paulburton@kernel.org>,
	Zhou Yanjie <zhouyanjie@wanyeetech.com>,
	od@zcrc.me, linux-kernel@vger.kernel.org,
	linux-mips@vger.kernel.org
Subject: Re: [PATCH v3 10/15] MIPS: generic: Increase NR_IRQS to 256
Date: Mon, 7 Sep 2020 21:53:37 +0200	[thread overview]
Message-ID: <20200907195337.GA17854@alpha.franken.de> (raw)
In-Reply-To: <20200906192935.107086-11-paul@crapouillou.net>

On Sun, Sep 06, 2020 at 09:29:30PM +0200, Paul Cercueil wrote:
> 128 IRQs is not enough to support Ingenic SoCs.
> 
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
> 
> Notes:
>     v2-v3: No change
> 
>  arch/mips/include/asm/mach-generic/irq.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/mips/include/asm/mach-generic/irq.h b/arch/mips/include/asm/mach-generic/irq.h
> index 72ac2c202c55..079889ced4f3 100644
> --- a/arch/mips/include/asm/mach-generic/irq.h
> +++ b/arch/mips/include/asm/mach-generic/irq.h
> @@ -9,7 +9,7 @@
>  #define __ASM_MACH_GENERIC_IRQ_H
>  
>  #ifndef NR_IRQS
> -#define NR_IRQS 128
> +#define NR_IRQS 256
>  #endif

this will increase NR_IRQS for all platforms, which don't override
NR_IRQS in their mach-XXX directory. Size of the data segment increases
by 18464 bytes for a 32bit kernel and 33792 for a 64bit kernel. I would
take this change as this allows to remove a few more mach-*/irq.h files.
And if a platform needs save every byte it finds, we can add a irq.h file
for that. An even nicer way would be to make NR_IRQS selectable via Kconfig.
Something like "select NR_IRQS 51" would be quite handy for that...

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]

  reply	other threads:[~2020-09-07 20:03 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-06 19:29 [PATCH v3 00/15] MIPS: Convert Ingenic to a generic board v3 Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 01/15] MIPS: configs: lb60: Fix defconfig not selecting correct board Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 02/15] MIPS: cpu-probe: Set Ingenic's writecombine to _CACHE_CACHABLE_WA Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 03/15] MIPS: cpu-probe: Mark XBurst CPU as having vtagged caches Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 04/15] MIPS: cpu-probe: ingenic: Fix broken BUG_ON Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 05/15] MIPS: Kconfig: add MIPS_GENERIC_KERNEL symbol Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 06/15] MIPS: generic: Allow boards to set system type Paul Cercueil
2020-09-08 16:27   ` Philippe Mathieu-Daudé
2020-09-06 19:29 ` [PATCH v3 07/15] MIPS: generic: Init command line with fw_init_cmdline() Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 08/15] MIPS: generic: Support booting with built-in or appended DTB Paul Cercueil
2020-09-07  7:54   ` Sergei Shtylyov
2020-09-07 12:39     ` Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 09/15] MIPS: generic: Add support for zboot Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 10/15] MIPS: generic: Increase NR_IRQS to 256 Paul Cercueil
2020-09-07 19:53   ` Thomas Bogendoerfer [this message]
2020-09-06 19:29 ` [PATCH v3 11/15] MIPS: generic: Add support for Ingenic SoCs Paul Cercueil
2020-10-12 14:33   ` Guenter Roeck
2020-10-12 14:59     ` Paul Cercueil
2020-10-12 18:26       ` Guenter Roeck
2020-10-12 19:27     ` [PATCH] MIPS: ingenic: Remove CPU_SUPPORTS_HUGEPAGES Paul Cercueil
2020-10-13  9:31       ` Thomas Bogendoerfer
2020-09-06 19:29 ` [PATCH v3 12/15] MIPS: jz4740: Drop all obsolete files Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 13/15] MIPS: jz4740: Rename jz4740 folders to ingenic Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 14/15] MIPS: configs: Regenerate configs of Ingenic boards Paul Cercueil
2020-09-06 19:29 ` [PATCH v3 15/15] MAINTAINERS: Update paths to Ingenic platform code Paul Cercueil
2020-09-18 14:40 ` [PATCH v3 00/15] MIPS: Convert Ingenic to a generic board v3 Thomas Bogendoerfer

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