Commit 16f48641 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

s390/mm: add missing virt_to_pfn() etc. helper functions 



Add all the missing little helper functions like virt_to_pfn(),
phys_to_page(), etc.  While we had a couple of these helper functions
like e.g. page_to_phys() the other functions were missing, which is
quite annoying if one is looking for exactly such a function.

Therefore finally add all those little helper functions.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent ac34bbc3

arch/s390/include/asm/page.h

+17 −7
Original line number Diff line number Diff line
@@ -154,14 +154,24 @@ static inline int devmem_is_allowed(unsigned long pfn) 


#define __PAGE_OFFSET		0x0UL

#define PAGE_OFFSET		0x0UL

#define __pa(x)                 (unsigned long)(x)

#define __va(x)                 (void *)(unsigned long)(x)

#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)

#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)

#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)



#define __pa(x)			((unsigned long)(x))

#define __va(x)			((void *)(unsigned long)(x))



#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)

#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)



#define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))

#define page_to_virt(page)	pfn_to_virt(page_to_pfn(page))



#define phys_to_pfn(kaddr)	((kaddr) >> PAGE_SHIFT)

#define pfn_to_phys(pfn)	((pfn) << PAGE_SHIFT)



#define phys_to_page(kaddr)	pfn_to_page(phys_to_pfn(kaddr))

#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)



#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)



#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | \

				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

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