taglinefilesource code
MAP_NR73include/asm-alpha/page.h#define MAP_NR(addr)    ((((unsigned long) (addr)) - PAGE_OFFSET) >> PAGE_SHIFT)
MAP_NR83include/asm-i386/page.h#define MAP_NR(addr)    (((unsigned long)(addr)) >> PAGE_SHIFT)
MAP_NR124include/asm-mips/page.h#define MAP_NR(addr)  (((addr) - PAGE_OFFSET) >> PAGE_SHIFT)
MAP_NR97include/asm-sparc/page.h#define MAP_NR(addr) ((((unsigned long)addr) - PAGE_OFFSET) >> PAGE_SHIFT)