6 Mar
2012
6 Mar
'12
11:36 p.m.
On Wed, Feb 29, 2012 at 04:04:22PM +0100, Marek Szyprowski wrote:
+static int arm_iommu_mmap_attrs(struct device *dev, struct
vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,struct dma_attrs *attrs)+{
- struct arm_vmregion *c;
- vma->vm_page_prot = __get_dma_pgprot(attrs, vma-
vm_page_prot);
- c = arm_vmregion_find(&consistent_head, (unsigned
long)cpu_addr);
What protects this against other insertions/removals from the list?
arm_vmregion_find uses a spin_lock internally before accessing consistent_head. So, it is protected.
-KR
--nvpublic