linux-kernel - Re: "kernel ade access" oops on LoongArch

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Date:   Wed, 15 Feb 2023 15:51:46 +0800
From:   Jinyang He <hejinyang@...ngson.cn>
To:     Youling Tang <tangyouling@...ngson.cn>,
        Xi Ruoyao <xry111@...111.site>
Cc:     loongarch@...ts.linux.dev, Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>, linux-kernel@...r.kernel.org
Subject: Re: "kernel ade access" oops on LoongArch

On 2023-02-15 15:23, Youling Tang wrote:

>
>
> On 02/15/2023 01:35 PM, Xi Ruoyao wrote:
>> On Wed, 2023-02-15 at 12:52 +0800, Youling Tang wrote:
>>> ../stdlib/stdlib.h:141:8: error: ‘_Float32’ does not name a type
>>>    141 | extern _Float32 strtof32 (const char *__restrict __nptr,
>>>        |        ^~~~~~~~
>>
>> This is because Glibc expects GCC 13 to support _Float32, but early GCC
>> 13 snapshots did not.
>>
>>> /usr/bin/ld: /home/loongson/build_glibc/libc.a(dl-reloc-static-pie.o):
>>> in function `_dl_relocate_static_pie':
>>> /home/loongson/glibc/elf/dl-reloc-static-pie.c:44: undefined reference
>>> to `_DYNAMIC'
>>
>> Oh, this one is my fault.  The check for compiler static PIE support was
>> not written correctly.  I'll fix it for Glibc later, but now you can
>> update GCC to the latest git master to proceed.
>>
>
> Tested on Loongson-3C5000L-LL machine, using CLFS7.3 system.
>
> $ gcc -v
> gcc version 13.0.0 20221018 (experimental) (GCC)
>
> # make check -j32
> /home/loongson/build_glibc/math/test-tgmath3-atan2.c: 
> 在函数‘test_atan2_84’中:
> /home/loongson/build_glibc/math/test-tgmath3-atan2.c:903:59: 
> 错误：conflicting types for ‘var__Float32x’; have ‘double’
>   903 |   extern typeof (atan2 (vol_var__Float32x, vol_var_char)) 
> var__Float32x __attribute__ ((unused));
>       | ^~~~~~~~~~~~~
>
> There was a build error in make check, so only tst-mallocfork3-
> malloc-check was tested separately.
>
> # make test t=malloc/tst-mallocfork3-malloc-check
> make[2]: 离开目录“/home/loongson/glibc/malloc”
> PASS: malloc/tst-mallocfork3-malloc-check
> original exit status 0
> info: signals received during fork: 301
> info: signals received during free: 1693
> info: signals received during malloc: 119
> make[1]: 离开目录“/home/loongson/glibc”
>
> A total of five tests are PASS, and the serial port does not display
> CallTrace.
>
> Youling.
>
I had test it by using the cmd "while true..." Ruoyao gave on

Loongson-3A5000, CLFS 7.1, 6.2-rc8 kernel with those patches and

6.2-rc7 kernel form loongson-next. No calltrace displayed, either.

Jinyang