Replace the open coded instance of vmap with the actual function. In the non-contiguous (IOMMU) case this requires an extra find_vm_area, but given that this isn't a fast path function that is a small price to pay.
Signed-off-by: Christoph Hellwig hch@lst.de Acked-by: Peter Zijlstra (Intel) peterz@infradead.org --- kernel/dma/remap.c | 48 ++++++++++++---------------------------------- 1 file changed, 12 insertions(+), 36 deletions(-)
diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c index d14cbc83986a..914ff5a58dd5 100644 --- a/kernel/dma/remap.c +++ b/kernel/dma/remap.c @@ -20,23 +20,6 @@ struct page **dma_common_find_pages(void *cpu_addr) return area->pages; }
-static struct vm_struct *__dma_common_pages_remap(struct page **pages, - size_t size, pgprot_t prot, const void *caller) -{ - struct vm_struct *area; - - area = get_vm_area_caller(size, VM_DMA_COHERENT, caller); - if (!area) - return NULL; - - if (map_vm_area(area, prot, pages)) { - vunmap(area->addr); - return NULL; - } - - return area; -} - /* * Remaps an array of PAGE_SIZE pages into another vm_area. * Cannot be used in non-sleeping contexts @@ -44,15 +27,12 @@ static struct vm_struct *__dma_common_pages_remap(struct page **pages, void *dma_common_pages_remap(struct page **pages, size_t size, pgprot_t prot, const void *caller) { - struct vm_struct *area; + void *vaddr;
- area = __dma_common_pages_remap(pages, size, prot, caller); - if (!area) - return NULL; - - area->pages = pages; - - return area->addr; + vaddr = vmap(pages, size >> PAGE_SHIFT, VM_DMA_COHERENT, prot); + if (vaddr) + find_vm_area(vaddr)->pages = pages; + return vaddr; }
/* @@ -62,24 +42,20 @@ void *dma_common_pages_remap(struct page **pages, size_t size, void *dma_common_contiguous_remap(struct page *page, size_t size, pgprot_t prot, const void *caller) { - int i; + int count = size >> PAGE_SHIFT; struct page **pages; - struct vm_struct *area; + void *vaddr; + int i;
- pages = kmalloc(sizeof(struct page *) << get_order(size), GFP_KERNEL); + pages = kmalloc_array(count, sizeof(struct page *), GFP_KERNEL); if (!pages) return NULL; - - for (i = 0; i < (size >> PAGE_SHIFT); i++) + for (i = 0; i < count; i++) pages[i] = nth_page(page, i); - - area = __dma_common_pages_remap(pages, size, prot, caller); - + vaddr = vmap(pages, count, VM_DMA_COHERENT, prot); kfree(pages);
- if (!area) - return NULL; - return area->addr; + return vaddr; }
/*