From: Michael Holzheu memcpy_real uses the mvcle instruction. This instruction alters all used registers (source, destination and 2 x count). Therefore we have to flag those registers as input/output registers (+d). In addition to that, we have to specify, that we read from memory designated by "src" and write to memory designated by "dest". Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- drivers/s390/char/zcore.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) Index: quilt-2.6/drivers/s390/char/zcore.c =================================================================== --- quilt-2.6.orig/drivers/s390/char/zcore.c +++ quilt-2.6/drivers/s390/char/zcore.c @@ -141,15 +141,16 @@ static int memcpy_real(void *dest, unsig if (count == 0) return 0; - flags = __raw_local_irq_stnsm(0xf8); /* switch to real mode */ + flags = __raw_local_irq_stnsm(0xf8UL); /* switch to real mode */ asm volatile ( "0: mvcle %1,%2,0x0\n" "1: jo 0b\n" " lhi %0,0x0\n" "2:\n" EX_TABLE(1b,2b) - : "+d" (rc) - : "d" (_dest), "d" (_src), "d" (_len1), "d" (_len2) + : "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1), + "+d" (_len2), "=m" (*((long*)dest)) + : "m" (*((long*)src)) : "cc", "memory"); __raw_local_irq_ssm(flags); -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/