linux-kernel - Re: [PATCH 8/8] parisc: Reduce size of __bug

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Date:   Thu, 30 Nov 2023 20:00:27 +0100
From:   Helge Deller <deller@....de>
To:     Guenter Roeck <linux@...ck-us.net>, deller@...nel.org
Cc:     linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/8] parisc: Reduce size of __bug_table[] on 64-bit kernel
 by half

On 11/30/23 18:30, Guenter Roeck wrote:
> On Fri, Nov 24, 2023 at 03:41:13PM +0100, deller@...nel.org wrote:
>> From: Helge Deller <deller@....de>
>>
>> Enable GENERIC_BUG_RELATIVE_POINTERS which will store 32-bit relative
>> offsets to the bug address and the source file name instead of 64-bit
>> absolute addresses. This effectively reduces the size of the
>> __bug_table[] array by half on 64-bit kernels.
>>
>> Signed-off-by: Helge Deller <deller@....de>
>
> With this patch in mainline, parisc:tinyconfig fails to build.
>
> ecurity/commoncap.c: In function 'cap_capset':
> arch/parisc/include/asm/bug.h:71:17: error: invalid 'asm': operand number out of range
>     71 |                 asm volatile("\n"                                       \
>        |                 ^~~
>
> and many similar errors. Bisect log attached.

Yes, problem was reported already and fix is in my for-next git tree:

https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git/commit/?h=for-next&id=487635756198cad563feb47539c6a37ea57f1dae

Thanks!
Helge