taglinefilesource code
BITS_PER_PTR48include/linux/shm.h#define __SHM_IDX_BITS  (BITS_PER_PTR-2-SHM_IDX_SHIFT)
BITS_PER_PTR56include/linux/shm.h#define _SHM_IDX_BITS  (__SHM_IDX_BITS+PAGE_SHIFT>=BITS_PER_PTR?\
BITS_PER_PTR57include/linux/shm.hBITS_PER_PTR-PAGE_SHIFT-1:__SHM_IDX_BITS)  /* sanity check */
BITS_PER_PTR64include/linux/shm.h#define SHM_READ_ONLY  (1<<(BITS_PER_PTR-1))