This is a note to let you know that I've just added the patch titled
ARM: DMA-mapping: add missing GFP_DMA flag for atomic buffer allocation
to the 3.8-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-dma-mapping-add-missing-gfp_dma-flag-for-atomic-buffer-allocation.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9d1400cf79afb49584b4873eb22cd5130cb341db Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Date: Tue, 26 Feb 2013 07:46:24 +0100
Subject: ARM: DMA-mapping: add missing GFP_DMA flag for atomic buffer allocation
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
commit 9d1400cf79afb49584b4873eb22cd5130cb341db upstream.
Atomic pool should always be allocated from DMA zone if such zone is
available in the system to avoid issues caused by limited dma mask of
any of the devices used for making an atomic allocation.
Reported-by: Krzysztof Halasa <khc@xxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mm/dma-mapping.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -330,6 +330,7 @@ static int __init atomic_pool_init(void)
{
struct dma_pool *pool = &atomic_pool;
pgprot_t prot = pgprot_dmacoherent(pgprot_kernel);
+ gfp_t gfp = GFP_KERNEL | GFP_DMA;
unsigned long nr_pages = pool->size >> PAGE_SHIFT;
unsigned long *bitmap;
struct page *page;
@@ -348,8 +349,8 @@ static int __init atomic_pool_init(void)
if (IS_ENABLED(CONFIG_CMA))
ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page);
else
- ptr = __alloc_remap_buffer(NULL, pool->size, GFP_KERNEL, prot,
- &page, NULL);
+ ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
+ NULL);
if (ptr) {
int i;
Patches currently in stable-queue which might be from m.szyprowski@xxxxxxxxxxx are
queue-3.8/arm-dma-mapping-add-missing-gfp_dma-flag-for-atomic-buffer-allocation.patch
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