linux-kernel - Re: [PATCH v3 2/2] vdso: Introduce vdso/page.h

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Message-ID: <6d79c86d-601b-46b9-a06e-6ab78b6d3e8a@arm.com>
Date: Mon, 7 Oct 2024 12:20:23 +0100
From: Vincenzo Frascino <vincenzo.frascino@....com>
To: Arnd Bergmann <arnd@...db.de>, 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>,
 Christophe Leroy <christophe.leroy@...roup.eu>,
 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 v3 2/2] vdso: Introduce vdso/page.h

On 07/10/2024 12:06, Arnd Bergmann wrote:
> On Mon, Oct 7, 2024, at 11:01, Vincenzo Frascino wrote:
>> On 04/10/2024 14:13, Arnd Bergmann wrote:
> 
>>
>> It seemed harmless from the tests I did. But adding an '&&
>> defined(CONFIG_32BIT)' makes it logically correct. I will add a comment as well
>> in the next version.
> 
> To clarify: this has to be "!defined(CONFIG_64BIT)", as most
> 32-bit architectures don't define the CONFIG_32BIT symbol
> (but all 64-bit ones define CONFIG_64BIT).
> 

You are right, it seemed that every 32-bit architectures with a
64-bit phys_addr_t had CONFIG_32BIT but this is not the case.

>     Arnd

-- 
Regards,
Vincenzo