linux-kernel - Re: [PATCH V3 2/2] mm/mmap: Drop generic protection

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Message-ID: <8819cd0a-4120-9afe-e491-2843681a0e7e@csgroup.eu>
Date:   Thu, 16 Jun 2022 05:27:15 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Anshuman Khandual <anshuman.khandual@....com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
CC:     "hch@...radead.org" <hch@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        kernel test robot <lkp@...el.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH V3 2/2] mm/mmap: Drop generic protection_map[] array



Le 16/06/2022 à 06:09, Anshuman Khandual a écrit :
> Move the protection_array[] array inside the arch for those platforms which

s/protection_array/protection_map

> do not enable ARCH_HAS_VM_GET_PAGE_PROT. Afterwards __SXXX/__PXX macros can
> be dropped completely which are now redundant.

I see some protection_map[] are __ro_after_init, some not.

I'm sure several of them could be const as they are never modified.


Christophe