linux-kernel - Re: [PATCH 5.15 00/59] 5.15.184-rc1 review

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Message-ID: <0f597436-5da6-4319-b918-9f57bde5634a@roeck-us.net>
Date: Fri, 23 May 2025 02:25:19 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org
Cc: patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
 torvalds@...ux-foundation.org, akpm@...ux-foundation.org, shuah@...nel.org,
 patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de,
 jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com,
 srw@...dewatkins.net, rwarsow@....de, conor@...nel.org,
 hargar@...rosoft.com, broonie@...nel.org
Subject: Re: [PATCH 5.15 00/59] 5.15.184-rc1 review

On 5/20/25 06:49, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.184 release.
> There are 59 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Thu, 22 May 2025 12:57:37 +0000.
> Anything received after that time might be too late.
> 

Build reference: v5.15.184
Compiler version: x86_64-linux-gcc (GCC) 12.4.0
Assembler version: GNU assembler (GNU Binutils) 2.40

Configuration file workarounds:
     "s/CONFIG_FRAME_WARN=.*/CONFIG_FRAME_WARN=0/"

Building i386:defconfig ... passed
Building i386:allyesconfig ... failed
--------------
Error log:
x86_64-linux-ld: arch/x86/kernel/static_call.o: in function `__static_call_transform':
static_call.c:(.ref.text+0x46): undefined reference to `cpu_wants_rethunk_at'
make[1]: [Makefile:1234: vmlinux] Error 1 (ignored)
--------------
Building i386:allmodconfig ... failed
--------------
Error log:
x86_64-linux-ld: arch/x86/kernel/static_call.o: in function `__static_call_transform':
static_call.c:(.ref.text+0x46): undefined reference to `cpu_wants_rethunk_at'
make[1]: [Makefile:1234: vmlinux] Error 1 (ignored)
--------------

In v5.15.y, cpu_wants_rethunk_at is only built if CONFIG_STACK_VALIDATION=y,
but that is not supported for i386 builds. The dummy function in
arch/x86/include/asm/alternative.h doesn't take that dependency into account.

Guenter