linux-kernel - Re: [PATCH 01/02] omap: dsp: remove shm from normal memory

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Date:	Thu, 2 Dec 2010 21:32:13 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Omar Ramirez Luna <omar.ramirez@...com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Tony Lindgren <tony@...mide.com>,
	Felipe Contreras <felipe.contreras@...il.com>,
	Fernando Guzman Lugo <x0095840@...com>,
	Rene Sapiens <rene.sapiens@...com>, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devel@...verdev.osuosl.org
Subject: Re: [PATCH 01/02] omap: dsp: remove shm from normal memory

On Wed, Nov 10, 2010 at 07:50:24PM -0600, Omar Ramirez Luna wrote:
> From: Felipe Contreras <felipe.contreras@...il.com>
> 
> Also, don't be picky about the location, which incidentally fixes the
> build since MEMBLOCK_REAL_LIMIT is gone on 2.6.37.

That comment is wrong.  memblock_alloc() is still as picky as the
original.

phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align)
{
        return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
}

        /* Pump up max_addr */
        if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
                end = memblock.current_limit;

and current_limit is initialized to what was MEMBLOCK_REAL_LIMIT.  So,
memblock_alloc() will always allocate from lowmem.
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