This is a note to let you know that I've just added the patch titled
ARM: zynq: Reserve correct amount of non-DMA RAM
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-zynq-reserve-correct-amount-of-non-dma-ram.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7a3cc2a7b2c723aa552028f4e66841cec183756d Mon Sep 17 00:00:00 2001
From: Kyle Roeschley <kyle.roeschley@xxxxxx>
Date: Mon, 31 Oct 2016 11:26:17 -0500
Subject: ARM: zynq: Reserve correct amount of non-DMA RAM
From: Kyle Roeschley <kyle.roeschley@xxxxxx>
commit 7a3cc2a7b2c723aa552028f4e66841cec183756d upstream.
On Zynq, we haven't been reserving the correct amount of DMA-incapable
RAM to keep DMA away from it (per the Zynq TRM Section 4.1, it should be
the first 512k). In older kernels, this was masked by the
memblock_reserve call in arm_memblock_init(). Now, reserve the correct
amount excplicitly rather than relying on swapper_pg_dir, which is an
address and not a size anyway.
Fixes: 46f5b96 ("ARM: zynq: Reserve not DMAable space in front of the kernel")
Signed-off-by: Kyle Roeschley <kyle.roeschley@xxxxxx>
Tested-by: Nathan Rossi <nathan@xxxxxxxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-zynq/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -59,7 +59,7 @@ void __iomem *zynq_scu_base;
static void __init zynq_memory_init(void)
{
if (!__pa(PAGE_OFFSET))
- memblock_reserve(__pa(PAGE_OFFSET), __pa(swapper_pg_dir));
+ memblock_reserve(__pa(PAGE_OFFSET), 0x80000);
}
static struct platform_device zynq_cpuidle_device = {
Patches currently in stable-queue which might be from kyle.roeschley@xxxxxx are
queue-4.4/arm-zynq-reserve-correct-amount-of-non-dma-ram.patch
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