From: Sergei Shtylyov <sergei.shtylyov@gmail.com>
To: David Laight <David.Laight@ACULAB.COM>,
'John Paul Adrian Glaubitz' <glaubitz@physik.fu-berlin.de>,
Guenter Roeck <linux@roeck-us.net>,
Sergey Shtylyov <s.shtylyov@omp.ru>,
Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
"linux-sh@vger.kernel.org" <linux-sh@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sh: Avoid using IRQ0 on SH3 and SH4
Date: Wed, 12 Jul 2023 11:20:46 +0300 [thread overview]
Message-ID: <c9483d7f-7f5f-dd29-2bba-5659a1dae7e0@gmail.com> (raw)
In-Reply-To: <c5ad5c59fcfa4888bd03fb8a855c989c@AcuMS.aculab.com>
On 7/12/23 11:12 AM, David Laight wrote:
>> Sent: 09 July 2023 00:13
> ....
>> Looking at arch/sh/boards/mach-r2d/irq.c, there is some IRQ translation going
>> on and maybe that's the part where we need to correct the offset by 16?
>
> Would it be less problematic to use (say) 16 for IRQ_0
> leaving IRQ_1+ as 1+ ?
I don't think so.
> At least that would only cause issues for code that needed
> to use IRQ_0.
>
> (It has to be said that making IRQ 0 invalid seemed wrong
> to me. x86 (IBM PC) gets away with it because IRQ 0 is
> always assigned to platform specific hardware.)
Not only x86, IIRC.
Have you seen the commit below?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ce753ad1549cbe9ccaea4c06a1f5fa47432c8289
IOW, try arguing with Linus. :-)
> David
MBR, Sergey
next prev parent reply other threads:[~2023-07-12 8:26 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-06 13:57 Guenter Roeck
2023-07-06 14:01 ` John Paul Adrian Glaubitz
2023-07-06 15:51 ` Guenter Roeck
2023-07-08 20:35 ` Sergey Shtylyov
2023-07-08 20:43 ` Sergey Shtylyov
2023-07-06 15:39 ` Geert Uytterhoeven
2023-07-06 15:51 ` Guenter Roeck
2023-07-06 16:38 ` John Paul Adrian Glaubitz
2023-07-06 17:04 ` Guenter Roeck
2023-07-06 17:41 ` John Paul Adrian Glaubitz
2023-07-08 20:55 ` Sergey Shtylyov
2023-07-07 7:14 ` Geert Uytterhoeven
2023-07-07 8:48 ` Geert Uytterhoeven
2023-07-07 9:30 ` John Paul Adrian Glaubitz
2023-07-07 9:53 ` John Paul Adrian Glaubitz
2023-07-07 14:34 ` Guenter Roeck
[not found] ` <407492B8-5D9F-41BC-A696-24C421C69F49@physik.fu-berlin.de>
2023-07-07 15:30 ` Guenter Roeck
2023-07-08 20:52 ` Sergey Shtylyov
2023-07-08 22:06 ` Guenter Roeck
2023-07-08 23:13 ` John Paul Adrian Glaubitz
2023-07-09 0:28 ` Guenter Roeck
2023-07-12 8:12 ` David Laight
2023-07-12 8:15 ` John Paul Adrian Glaubitz
2023-07-12 8:20 ` Sergei Shtylyov [this message]
2023-07-12 8:24 ` David Laight
2023-07-12 15:38 ` Guenter Roeck
2023-07-12 15:51 ` John Paul Adrian Glaubitz
2023-07-12 16:22 ` Sergey Shtylyov
2023-07-12 16:25 ` Sergey Shtylyov
2023-07-08 13:26 ` Guenter Roeck
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