linux-kernel - Re: [PATCH V4 00/26] mm/mmap: Drop __SXXX/_

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Message-ID: <YrVJ6GaSzD/4kD6M@infradead.org>
Date:   Thu, 23 Jun 2022 22:21:44 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     Christoph Hellwig <hch@...radead.org>, linux-mm@...ck.org,
        christophe.leroy@...roup.eu,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
        x86@...nel.org, openrisc@...ts.librecores.org,
        linux-xtensa@...ux-xtensa.org, linux-csky@...r.kernel.org,
        linux-hexagon@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-alpha@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-um@...ts.infradead.org,
        linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 00/26] mm/mmap: Drop __SXXX/__PXXX macros from across
 platforms

On Fri, Jun 24, 2022 at 10:50:33AM +0530, Anshuman Khandual wrote:
> > On most architectures this should be const now, only very few ever
> > modify it.
> 
> Will make it a 'static const pgprot_t protection_map[16] __ro_after_init'
> on platforms that do not change the protection_map[] even during boot.

No need for __ro_after_init when it is already declarated const.