Re: [PATCH] Allow memblock steal operations to remove memory from anywhere
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: 2012-08-12 12:07:59
Also in:
linux-arm-kernel
On Sun, Aug 12, 2012 at 11:57:08AM +0100, Russell King - ARM Linux wrote:
Found this with the cubox, which wants to obtain large blocks of RAM for the GPU and VPU devices at boot time. I don't believe any other platforms care where the memory comes from, so I think this is safe. However, OMAP and iMX folk should check this patch - thanks. 8<=== From: Russell King <redacted> Subject: ARM: Allow arm_memblock_steal() to remove memory from any RAM region Allow arm_memblock_steal() to remove memory from any RAM region, including highmem areas. This allows memory to be stolen from the very top of declared memory, including highmem areas, rather than our precious lowmem. Signed-off-by: Russell King <redacted>
There shouldn't be any problems with this on i.MX. Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
quoted hunk ↗ jump to hunk
--- arch/arm/mm/init.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index f54d592..04632f3 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c@@ -324,7 +324,7 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align) BUG_ON(!arm_memblock_steal_permitted); - phys = memblock_alloc(size, align); + phys = memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE); memblock_free(phys, size); memblock_remove(phys, size);
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