tag	line	file	source code
PROC_PID_CMDLINE	773	fs/proc/array.c	case PROC_PID_CMDLINE:
PROC_PID_CMDLINE	120	fs/proc/base.c	PROC_PID_CMDLINE, 7, "cmdline",
PROC_PID_CMDLINE	254	fs/proc/inode.c	case PROC_PID_CMDLINE: