linux-kernel - Re: [PATCH 06/28] nios2: Memory management

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Message-ID: <20140422142443.GB15745@arch.cereza>
Date:	Tue, 22 Apr 2014 11:24:43 -0300
From:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
To:	Ley Foon Tan <lftan@...era.com>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, lftan.linux@...il.com,
	cltang@...esourcery.com
Subject: Re: [PATCH 06/28] nios2: Memory management

Hi Ley Foon,

On Apr 18, Ley Foon Tan wrote:
> +/*
> + * PAGE_SHIFT determines the page size
> + */
> +#define PAGE_SHIFT	12
> +#define PAGE_SIZE	4096
> +#define PAGE_MASK	(~(PAGE_SIZE - 1))
> +

How about something like this:

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT              12
#define PAGE_SIZE               (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK               (~((1 << PAGE_SHIFT) - 1))

Otherwise, the PAGE_SIZE macro above produces some warnings, IIRC.

-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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