taglinefilesource code
MAP_NR67include/asm-alpha/page.h#define MAP_NR(addr)    ((((unsigned long) (addr)) - PAGE_OFFSET) >> PAGE_SHIFT)
MAP_NR61include/asm-i386/page.h#define MAP_NR(addr)    (((unsigned long)(addr)) >> PAGE_SHIFT)
MAP_NR118include/asm-mips/page.h#define MAP_NR(addr)  (((addr) - PAGE_OFFSET) >> PAGE_SHIFT)
MAP_NR75include/asm-sparc/page.h#define MAP_NR(addr) (((unsigned long)(addr)) >> PAGE_SHIFT)