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Date:   Sun, 3 Jul 2022 22:54:49 +0100
From:   Matthew Wilcox <willy@infradead.org>
To:     "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Arnd Bergmann <arnd@arndb.de>, Mike Rapoport <rppt@kernel.org>,
        linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 15/14] arm: Rename PMD_ORDER to PMD_BITS
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References: <20220703141203.147893-1-rppt@kernel.org>
 <20220703211441.3981873-1-willy@infradead.org>
 <YsIHPStHG84Ksu7m@shell.armlinux.org.uk>
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On Sun, Jul 03, 2022 at 10:16:45PM +0100, Russell King (Oracle) wrote:
> On Sun, Jul 03, 2022 at 10:14:41PM +0100, Matthew Wilcox (Oracle) wrote:
> > This is the number of bits used by a PMD entry, not the order of a PMD.
> 
> No, it's not the number of bits. A PMD entry doesn't fit in 2 or 3 bits.
> This is even more confusing.

Well, what is it then?  The order of something is PAGE_SIZE << n, and
that doesn't seem to be what this is.  Happy to call it whatever you
want to call it.