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| author | Geliang Tang <geliangtang@gmail.com> | 2017-03-24 15:10:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-08 18:26:18 +0200 |
| commit | 0dd89119614ba7afb6fe901a1760fa2e706cce86 (patch) | |
| tree | ca2e27934e479f469056b7e94d6100e6720ffce4 /drivers/base/dma-mapping.c | |
| parent | Documentation/ABI: add information about cpu_capacity (diff) | |
| download | linux-0dd89119614ba7afb6fe901a1760fa2e706cce86.tar.xz linux-0dd89119614ba7afb6fe901a1760fa2e706cce86.zip | |
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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/dma-mapping.c')
| -rw-r--r-- | drivers/base/dma-mapping.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index efd71cf4fdea..51b7061ff7c0 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); |