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Date: Fri, 24 Mar 2017 22:10:49 +0800 From: Geliang Tang <geliangtang@...il.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: Geliang Tang <geliangtang@...il.com>, linux-kernel@...r.kernel.org Subject: [PATCH] drivers: base: dma-mapping: use nth_page helper Use nth_page() helper instead of page_to_pfn() and pfn_to_page() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@...il.com> --- drivers/base/dma-mapping.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index efd71cf..51b7061 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -309,14 +309,13 @@ void *dma_common_contiguous_remap(struct page *page, size_t size, int i; struct page **pages; void *ptr; - unsigned long pfn; pages = kmalloc(sizeof(struct page *) << get_order(size), GFP_KERNEL); if (!pages) return NULL; - for (i = 0, pfn = page_to_pfn(page); i < (size >> PAGE_SHIFT); i++) - pages[i] = pfn_to_page(pfn + i); + for (i = 0; i < (size >> PAGE_SHIFT); i++) + pages[i] = nth_page(page, i); ptr = dma_common_pages_remap(pages, size, vm_flags, prot, caller); -- 2.9.3
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