linux-kernel - Re: [PATCH] mm/page_table_check: Drop all redundant EXPORT

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Message-ID: <YmDOKJCZteqrKr61@casper.infradead.org>
Date:   Thu, 21 Apr 2022 04:23:20 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Pasha Tatashin <pasha.tatashin@...een.com>
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/page_table_check: Drop all redundant EXPORT_SYMBOL()

On Wed, Apr 20, 2022 at 12:54:08PM -0400, Pasha Tatashin wrote:
> The rest of EXPORTs were added to be symmetric, and allow other
> drivers to use set_*p**()/clear_p** calls.

EXPORT_SYMBOLs actually have a real cost.  We don't add them "for
symmetry".