void cma_unmap_kernel(u32 phys_addr, size_t size, void *cpu_addr)
{
struct page *page = phys_to_page(phys_addr);
BUG_ON(unlikely(!pfn_valid(__phys_to_pfn(phys_addr))));
size = PAGE_ALIGN(size);
if (PageHighMem(page))
__dma_free_remap(cpu_addr, size);
else
__dma_remap(page, size, pgprot_kernel);
}
/*
* free a page as defined by the above mapping.
* Must not be called with IRQs disabled.
*/
void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t handle)
{
WARN_ON(irqs_disabled());
if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
return;
size = PAGE_ALIGN(size);
if (!arch_is_coherent())
__dma_free_remap(cpu_addr, size);
__dma_free_buffer(pfn_to_page(dma_to_pfn(dev, handle)), size);
}