tag	line	file	source code
IOPL_MASK	123	kernel/vm86.c	current->v86mask = NT_MASK | IOPL_MASK;
IOPL_MASK	126	kernel/vm86.c	current->v86mask = AC_MASK | NT_MASK | IOPL_MASK;
IOPL_MASK	129	kernel/vm86.c	current->v86mask = ID_MASK | AC_MASK | NT_MASK | IOPL_MASK;