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powerpc/mm: Use PFN_PHYS() in devmem_is_allowed()

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This function can run on systems where physical addresses don't
fit in unsigned long, so make sure to use the macro that contains the
proper cast.

Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Scott Wood 2015-04-17 16:17:14 -05:00
parent 86c3b16e9f
commit 6c0cc62715
1 changed files with 1 additions and 1 deletions
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arch/powerpc/mm/mem.c
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@ -560,7 +560,7 @@ subsys_initcall(add_system_ram_resources);
*/
int devmem_is_allowed(unsigned long pfn)
{
if (iomem_is_exclusive(pfn << PAGE_SHIFT))
if (iomem_is_exclusive(PFN_PHYS(pfn)))
return 0;
if (!page_is_ram(pfn))
return 1;