On Thu, May 7, 2015 at 7:55 AM, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > Hi Dan, > > On Wed, 06 May 2015 16:04:59 -0400 Dan Williams <dan.j.williams@xxxxxxxxx> wrote: >> >> diff --git a/include/asm-generic/pfn.h b/include/asm-generic/pfn.h >> new file mode 100644 >> index 000000000000..91171e0285d9 >> --- /dev/null >> +++ b/include/asm-generic/pfn.h >> @@ -0,0 +1,51 @@ >> +#ifndef __ASM_PFN_H >> +#define __ASM_PFN_H >> + >> +#ifndef __pfn_to_phys >> +#define __pfn_to_phys(pfn) ((dma_addr_t)(pfn) << PAGE_SHIFT) > > Why dma_addr_t and not phys_addr_t? i.e. it could use a comment if it > is correct. Hmm, this was derived from: #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) in arch/x86/include/asm/io.h The primary users of __pfn_to_phys() is dma_map_page(). I'll add a comment to that effect. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
