Re: [PATCH 6.12 000/666] 6.12.91-rc1 review

[Florian Fainelli <f.fainelli@gmail.com>]

On 5/20/26 09:13, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.91 release.
> There are 666 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 Fri, 22 May 2026 16:20:16 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.91-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

perf fails to build on ARM/ARM64/MIPS with:

In file included from libbpf.c:54:
libbpf.c: In function 'bpf_object__elf_init':
libbpf.c:1538:76: error: implicit declaration of function 'errstr'; did 
you mean 'strstr'? [-Werror=implicit-function-declaration]
  1538 |                         pr_warn("elf: failed to open %s: %s\n", 
obj->path, errstr(err));
       | 
            ^~~~~~
libbpf_internal.h:167:47: note: in definition of macro '__pr'
   167 |         libbpf_print(level, "libbpf: " fmt, ##__VA_ARGS__);     \
       |                                               ^~~~~~~~~~~

this is due to commit 2e81d08459c32c57d037ad160e755bcfe6d5003b
Author: Mykyta Yatsenko <yatsenko@meta.com>
Date:   Mon Nov 11 21:29:17 2024 +0000

     libbpf: Stringify errno in log messages in libbpf.c

     [ Upstream commit 271abf041cb354ce99df33ce1f99db79faf90477 ]


we would need to backport the below commit, but it does not apply 
cleanly to 6.12.y:

commit c68b6fdc3600466e3c265bad34d099eb8c5280f1
Author: Andrii Nakryiko <andrii@kernel.org>
Date:   Wed Oct 1 10:13:24 2025 -0700

     libbpf: move libbpf_errstr() into libbpf_utils.c
-- 
Florian