taglinefilesource code
shm_cpid11include/linux/shm.hunsigned short  shm_cpid;  /* pid of creator */
shm_cpid114ipc/shm.cshp->shm_cpid = current->pid;
shm_cpid271ipc/shm.ctbuf.shm_cpid   = shp->shm_cpid;
shm_cpid316ipc/shm.ctbuf.shm_cpid   = shp->shm_cpid;