ucbuf 443 arch/s390/include/asm/cpacf.h static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len, ucbuf 447 arch/s390/include/asm/cpacf.h register unsigned long r2 asm("2") = (unsigned long) ucbuf; ucbuf 455 arch/s390/include/asm/cpacf.h : [ucbuf] "+a" (r2), [ucbuflen] "+d" (r3),