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memcg: helper function for relcaim from shmem.
[linux-2.6/mini2440.git]
/
include
/
linux
/
pfn.h
blob
bb01f8b92b56208bf7b433d842f7d0821647e691
1
#ifndef _LINUX_PFN_H_
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#define _LINUX_PFN_H_
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#define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
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#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
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#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
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#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
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#endif