From 53a0868cb4d77dcba8e95e1033361ffdb6e510e2 Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Fri, 12 Oct 2007 16:11:44 +0200 Subject: [PATCH] [S390] zcore: fix inline assembly in memcpy_real() 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(-) diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c index 3712ede167..7073daf779 100644 --- a/drivers/s390/char/zcore.c +++ b/drivers/s390/char/zcore.c @@ -141,15 +141,16 @@ static int memcpy_real(void *dest, unsigned long src, size_t count) 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); -- 2.39.5