From e9da6e9905e639b0f842a244bc770b48ad0523e9 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Mon, 30 Jul 2012 09:11:33 +0200 Subject: 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 Reviewed-by: Kyungmin Park Reviewed-by: Minchan Kim --- mm/vmalloc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'mm/vmalloc.c') diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 11308f034f85..65fc4dc71108 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; -- cgit v1.2.1