SHM_SHARE_MMU
if (advice_ism >= 0 && (shmflag & SHM_SHARE_MMU)) {
if ((shm_attached = shmat(shm_id, NULL, SHM_SHARE_MMU)) == (void *)-1)
flags = flags & ~SHM_SHARE_MMU;
flags = flags | SHM_SHARE_MMU;
(SHM_R | SHM_W | SHM_RDONLY | SHM_RND | SHM_SHARE_MMU | SHM_PAGEABLE)
#define spt_locked(a) ((a) & SHM_SHARE_MMU)
if (sptd->spt_flags & SHM_SHARE_MMU)