SHM_W
# ifndef SHM_W
shmflg = SHM_R|SHM_W|(SHM_R>>3)|(SHM_W>>3);
SHM_R|SHM_W|(SHM_R>>3)|(SHM_W>>3),
(error = ipcperm_access(&sp->shm_perm, SHM_W, CRED())))
if (useISM && (error = ipcperm_access(&sp->shm_perm, SHM_W, CRED())))
(SHM_R | SHM_W | SHM_RDONLY | SHM_RND | SHM_SHARE_MMU | SHM_PAGEABLE)