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s390/mm: add missing pfn_to_kaddr helper 

kasan common code uses pfn_to_kaddr, which is defined by many other
architectures. Adding it as well to avoid a build error.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik 2017-11-17 11:21:49 +01:00 committed by Martin Schwidefsky
parent 49698745e5
commit 75f195420a
1 changed files with 1 additions and 0 deletions
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arch/s390/include/asm/page.h
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@ -161,6 +161,7 @@ static inline int devmem_is_allowed(unsigned long pfn)
#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
#define pfn_to_kaddr(pfn) pfn_to_virt(pfn)
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
#define page_to_virt(page) pfn_to_virt(page_to_pfn(page))