linux-kernel - Re: [PATCH 5/9] vdso: Split linux/minmax.h

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Message-Id: <780d969f-8057-41aa-901f-08a5fbebcba9@app.fastmail.com>
Date: Wed, 04 Sep 2024 17:23:24 +0000
From: "Arnd Bergmann" <arnd@...db.de>
To: "Christophe Leroy" <christophe.leroy@...roup.eu>,
 "Vincenzo Frascino" <vincenzo.frascino@....com>,
 linux-kernel@...r.kernel.org, Linux-Arch <linux-arch@...r.kernel.org>,
 linux-mm@...ck.org
Cc: "Andy Lutomirski" <luto@...nel.org>,
 "Thomas Gleixner" <tglx@...utronix.de>,
 "Jason A . Donenfeld" <Jason@...c4.com>,
 "Michael Ellerman" <mpe@...erman.id.au>,
 "Nicholas Piggin" <npiggin@...il.com>, "Naveen N Rao" <naveen@...nel.org>,
 "Ingo Molnar" <mingo@...hat.com>, "Borislav Petkov" <bp@...en8.de>,
 "Dave Hansen" <dave.hansen@...ux.intel.com>,
 "H. Peter Anvin" <hpa@...or.com>, "Theodore Ts'o" <tytso@....edu>,
 "Andrew Morton" <akpm@...ux-foundation.org>,
 "Steven Rostedt" <rostedt@...dmis.org>,
 "Masami Hiramatsu" <mhiramat@...nel.org>,
 "Mathieu Desnoyers" <mathieu.desnoyers@...icios.com>
Subject: Re: [PATCH 5/9] vdso: Split linux/minmax.h

On Wed, Sep 4, 2024, at 17:17, Christophe Leroy wrote:
> Le 03/09/2024 à 17:14, Vincenzo Frascino a écrit :
>> The VDSO implementation includes headers from outside of the
>> vdso/ namespace.
>> 
>> Split linux/minmax.h to make sure that the generic library
>> uses only the allowed namespace.
>
> It is probably easier to just don't use min_t() in VDSO. Can be open 
> coded without impeeding readability.

Right, or possibly the even simpler MIN()/MAX() if the arguments
have no side-effects.

       Arnd