#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)