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: <fe7c52f9-5ff3-95a5-2692-20f81d6decf7@gmail.com>
Date:   Fri, 17 Jun 2022 14:13:12 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.10.0
Subject: Ping: [PATCH] uapi: Make __{u,s}64 match {u,}int64_t in userspace
Content-Language: en-US
To:     Cyril Hrubis <chrubis@suse.cz>
Cc:     "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
        libc-alpha@sourceware.org,
        "linux-api@vger.kernel.org" <linux-api@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        David Laight <David.Laight@aculab.com>,
        Zack Weinberg <zack@owlfolio.org>,
        "ltp@lists.linux.it" <ltp@lists.linux.it>,
        David Howells <dhowells@redhat.com>
References: <b8d6f890-e5aa-44bf-8a55-5998efa05967@www.fastmail.com>
 <YZvIlz7J6vOEY+Xu@yuki> <1618289.1637686052@warthog.procyon.org.uk>
 <ff8fc4470c8f45678e546cafe9980eff@AcuMS.aculab.com> <YaTAffbvzxGGsVIv@yuki>
 <CAK8P3a1Rvf_+qmQ5pyDeKweVOFM_GoOKnG4HA3Ffs6LeVuoDhA@mail.gmail.com>
 <913509.1638457313@warthog.procyon.org.uk> <YbDQW6uakG3XD8jV@yuki>
From:   Alejandro Colomar <alx.manpages@gmail.com>
In-Reply-To: <YbDQW6uakG3XD8jV@yuki>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Cyril,

On 12/8/21 16:33, Cyril Hrubis wrote:
> Hi!
>>> I could be persuaded otherwise with an example of a program for which
>>> changing __s64 from 'long long' to 'long' would break *binary* backward
>>> compatibility, or similarly for __u64.
>>
>> C++ could break.
> 
> Thinking of this again we can detect C++ as well so it can be safely
> enabled just for C with:
> 
> #if !defined(__KERNEL__) && !defined(__cplusplus) && __BITSPERLONG == 64
> # include <asm-generic/int-l64.h>
> #else
> # include <asm-generic/int-ll64.h>
> #endif
> 

I'm very interested in seeing this merged, as that would allow 
simplifying the man-pages by removing unnecessary kernel details such as 
u64[1].  How is the state of this patch?

Cheers,

Alex


[1]: 
<https://lore.kernel.org/linux-man/20210423230609.13519-1-alx.manpages@gmail.com/T/#u>

-- 
Alejandro Colomar
<http://www.alejandro-colomar.es/>