sc_a 25 arch/xtensa/include/uapi/asm/sigcontext.h unsigned long sc_a[16]; sc_a 150 arch/xtensa/kernel/signal.c err |= __copy_to_user (sc->sc_a, regs->areg, 16 * 4); sc_a 209 arch/xtensa/kernel/signal.c err |= __copy_from_user(regs->areg, sc->sc_a, 16 * 4);