Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <a94334d8-0a9a-1cbc-ebfe-1825abfb8307@leemhuis.info>
Date:   Sat, 8 Jul 2023 15:07:46 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.12.0
Content-Language: en-US, de-DE
To:     Guenter Roeck <linux@roeck-us.net>,
        Mark Rutland <mark.rutland@arm.com>
Cc:     linux-kernel@vger.kernel.org, akiyks@gmail.com,
        boqun.feng@gmail.com, corbet@lwn.net, keescook@chromium.org,
        linux@armlinux.org.uk, linux-doc@vger.kernel.org,
        mchehab@kernel.org, paulmck@kernel.org, peterz@infradead.org,
        rdunlap@infradead.org, sstabellini@kernel.org, will@kernel.org
References: <20230605070124.3741859-1-mark.rutland@arm.com>
 <20230605070124.3741859-5-mark.rutland@arm.com>
 <32395f1f-19e4-41da-9f67-68c7d21cf9b2@roeck-us.net>
From:   "Linux regression tracking (Thorsten Leemhuis)" 
        <regressions@leemhuis.info>
Reply-To: Linux regressions mailing list <regressions@lists.linux.dev>
Subject: Re: [PATCH v2 04/27] locking/atomic: make atomic*_{cmp,}xchg optional
In-Reply-To: <32395f1f-19e4-41da-9f67-68c7d21cf9b2@roeck-us.net>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 27.06.23 19:07, Guenter Roeck wrote:
> On Mon, Jun 05, 2023 at 08:01:01AM +0100, Mark Rutland wrote:
>> Most architectures define the atomic/atomic64 xchg and cmpxchg
>> operations in terms of arch_xchg and arch_cmpxchg respectfully.
>>
>> Add fallbacks for these cases and remove the trivial cases from arch
>> code. On some architectures the existing definitions are kept as these
>> are used to build other arch_atomic*() operations.
>>
>> Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> [...]
> 
> This patch results in:
> 
> ERROR: modpost: "__xchg_called_with_bad_pointer" [lib/atomic64_test.ko] undefined!
> 
> when trying to build sparc64:allmodconfig.

Guenter, please correct me if I'm wrong:

This is fixed by Arnd's patch "sparc: mark __arch_xchg() as
__always_inline", but that afaics sadly hasn't even reached -next yet.
https://lore.kernel.org/all/20230628094938.2318171-1-arnd@kernel.org/

Hence adding it to the tracking now that the end of the merge window is
near:

#regzbot ^introduced d12157efc8e083c7
#regzbot title locking/atomic: build error on sparc64:allmodconfig
#regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
That page also explains what to do if mails like this annoy you.