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Sender: Guenter Roeck <groeck7@gmail.com>
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Date:   Mon, 10 Oct 2022 10:49:10 -0700
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To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org
Cc:     stable@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org, shuah@kernel.org, patches@kernelci.org,
        lkft-triage@lists.linaro.org, pavel@denx.de, jonathanh@nvidia.com,
        f.fainelli@gmail.com, sudipm.mukherjee@gmail.com,
        srw@sladewatkins.net
References: <20221010070331.211113813@linuxfoundation.org>
From:   Guenter Roeck <linux@roeck-us.net>
Subject: Re: [PATCH 5.15 00/37] 5.15.73-rc1 review
In-Reply-To: <20221010070331.211113813@linuxfoundation.org>
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On 10/10/22 00:05, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.73 release.
> There are 37 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 Wed, 12 Oct 2022 07:03:19 +0000.
> Anything received after that time might be too late.
> 

Building h8300:allnoconfig ... failed
--------------
Error log:
In file included from include/linux/fs.h:6,
                  from include/linux/huge_mm.h:8,
                  from include/linux/mm.h:727,
                  from include/linux/pid_namespace.h:7,
                  from include/linux/ptrace.h:10,
                  from arch/h8300/kernel/asm-offsets.c:15:
include/linux/wait_bit.h: In function 'wait_on_bit':
include/linux/wait_bit.h:74:14: error: implicit declaration of function 'test_bit_acquire'; did you mean 'test_bit_le'? [-Werror=implicit-function-declaration]
    74 |         if (!test_bit_acquire(bit, word))
       |              ^~~~~~~~~~~~~~~~
       |              test_bit_le

This affects h8300 builds in all branches all the way back to v4.9.y.
It also affects release candidates for various other architectures
in v4.9.y..v5.10.y. In v4.9.y.queue, for example, I see 56 build
failures out of 164 builds; most if not all of those can be attributed
to problems with test_bit_acquire() - either due to a missing or due
to a bad backport.

I can only hope that fix for the the problem that required the
test_bit_acquire() backport is worth the trouble it causes.

Guenter