ra                 36 arch/alpha/include/uapi/asm/regdef.h #define ra	$26	/* return address register */
ra                 59 arch/mips/include/asm/regdef.h #define ra	$31	/* return address */
ra                102 arch/mips/include/asm/regdef.h #define ra	$31	/* return address */
ra                 76 arch/mips/kernel/pm-cps.c 	t8, t9, k0, k1, gp, sp, fp, ra,