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authorMarek Szyprowski <m.szyprowski@samsung.com>2012-07-30 09:11:33 +0200
committerMarek Szyprowski <m.szyprowski@samsung.com>2012-07-30 12:25:45 +0200
commite9da6e9905e639b0f842a244bc770b48ad0523e9 (patch)
treec99beeb259716121dcb388f35f54f99a2a414a92 /mm
parent5e6cafc83e30f0f70c79a2b7aef237dc57e29f02 (diff)
downloadop-kernel-dev-e9da6e9905e639b0f842a244bc770b48ad0523e9.zip
op-kernel-dev-e9da6e9905e639b0f842a244bc770b48ad0523e9.tar.gz
ARM: dma-mapping: remove custom consistent dma region
This patch changes dma-mapping subsystem to use generic vmalloc areas for all consistent dma allocations. This increases the total size limit of the consistent allocations and removes platform hacks and a lot of duplicated code. Atomic allocations are served from special pool preallocated on boot, because vmalloc areas cannot be reliably created in atomic context. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Minchan Kim <minchan@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmalloc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 11308f0..65fc4dc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1403,7 +1403,15 @@ struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
-1, GFP_KERNEL, caller);
}
-static struct vm_struct *find_vm_area(const void *addr)
+/**
+ * find_vm_area - find a continuous kernel virtual area
+ * @addr: base address
+ *
+ * Search for the kernel VM area starting at @addr, and return it.
+ * It is up to the caller to do all required locking to keep the returned
+ * pointer valid.
+ */
+struct vm_struct *find_vm_area(const void *addr)
{
struct vmap_area *va;
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