linux-kernel - Re: [PATCH 1/3] arm: Rename PMD_ORDER to PMD_TABLE

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Message-ID: <20210715164740.GN22278@shell.armlinux.org.uk>
Date:   Thu, 15 Jul 2021 17:47:41 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-arch@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] arm: Rename PMD_ORDER to PMD_TABLE_ORDER

On Thu, Jul 15, 2021 at 02:46:10PM +0100, Matthew Wilcox (Oracle) wrote:
> This is the order of the page table allocation, not the order of a PMD.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> ---
>  arch/arm/kernel/head.S | 34 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
> index 9eb0b4dbcc12..6da39a1d70ba 100644
> --- a/arch/arm/kernel/head.S
> +++ b/arch/arm/kernel/head.S
> @@ -38,10 +38,10 @@
>  #ifdef CONFIG_ARM_LPAE
>  	/* LPAE requires an additional page for the PGD */
>  #define PG_DIR_SIZE	0x5000
> -#define PMD_ORDER	3
> +#define PMD_TABLE_ORDER	3
>  #else
>  #define PG_DIR_SIZE	0x4000
> -#define PMD_ORDER	2
> +#define PMD_TABLE_ORDER	2

I think PMD_ENTRY_ORDER would make more sense here - this is the
power-of-2 of an individual PMD entry, not of the entire table.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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