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Sender: Guenter Roeck <groeck7@gmail.com>
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Date: Tue, 23 Jan 2024 07:31:39 -0800
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Subject: Re: [PATCH v4 5/6] add listmount(2) syscall
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To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: amir73il@gmail.com, arnd@arndb.de, christian@brauner.io,
 dhowells@redhat.com, fweimer@redhat.com, kzak@redhat.com,
 linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org,
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From: Guenter Roeck <linux@roeck-us.net>
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In-Reply-To: <20240123141408.3756120-1-glaubitz@physik.fu-berlin.de>
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On 1/23/24 06:14, John Paul Adrian Glaubitz wrote:
> Hi Guenter,
> 
>> with this patch in the tree, all sh4 builds fail with ICE.
>>
>> during RTL pass: final
>> In file included from fs/namespace.c:11:
>> fs/namespace.c: In function '__se_sys_listmount':
>> include/linux/syscalls.h:258:9: internal compiler error: in change_address_1, at emit-rtl.c:2275
>>
>> I tested with gcc 8.2, 11.3, 11.4, and 12.3. The compiler version
>> does not make a difference. Has anyone else seen the same problem ?
>> If so, any idea what to do about it ?
> 
> I'm not seeing any problems building the SH kernel except some -Werror=missing-prototypes warnings.
> 

The problem has been fixed thanks to some guidance from Linus. I did disable
CONFIG_WERROR for sh (and a few other architectures) because it now always
results in pointless build failures on test builds due to commit 0fcb70851fbf
("Makefile.extrawarn: turn on missing-prototypes globally").

> I'm using gcc 11.1 from here [1].
> 
> Adrian
> 
> PS: Please always CC linux-sh and the SH maintainers when reporting issues.
> 

When reporting anything in the linux kernel, it is always a tight rope between
copying too few or too many people or mailing lists. I have been scolded for both.
Replying to the original patch historically results in the fewest complaints,
so I think I'll stick to that.

Guenter