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authorHeiko Carstens <heiko.carstens@de.ibm.com>2016-06-20 14:03:00 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-06-28 09:32:31 +0200
commiteb090ad2ad5c7d0b4264a54f371683f2b2de1f9d (patch)
tree26797fc48f3384875f66a10cd862b50b771e3c80 /net
parent11d376730384a07568b56ca8d43989d25e585760 (diff)
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s390/iucv: use basic blocks for iucv inline assemblies
Use only simple inline assemblies which consist of a single basic block if the register asm construct is being used. Otherwise gcc would generate broken code if the compiler option --sanitize-coverage=trace-pc would be used. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'net')
-rw-r--r--net/iucv/iucv.c36
1 files changed, 27 insertions, 9 deletions
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 7eaa000c9258..88a2a3ba4212 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -320,21 +320,29 @@ static union iucv_param *iucv_param_irq[NR_CPUS];
*
* Returns the result of the CP IUCV call.
*/
-static inline int iucv_call_b2f0(int command, union iucv_param *parm)
+static inline int __iucv_call_b2f0(int command, union iucv_param *parm)
{
register unsigned long reg0 asm ("0");
register unsigned long reg1 asm ("1");
int ccode;
reg0 = command;
- reg1 = virt_to_phys(parm);
+ reg1 = (unsigned long)parm;
asm volatile(
" .long 0xb2f01000\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (ccode), "=m" (*parm), "+d" (reg0), "+a" (reg1)
: "m" (*parm) : "cc");
- return (ccode == 1) ? parm->ctrl.iprcode : ccode;
+ return ccode;
+}
+
+static inline int iucv_call_b2f0(int command, union iucv_param *parm)
+{
+ int ccode;
+
+ ccode = __iucv_call_b2f0(command, parm);
+ return ccode == 1 ? parm->ctrl.iprcode : ccode;
}
/**
@@ -345,16 +353,12 @@ static inline int iucv_call_b2f0(int command, union iucv_param *parm)
* Returns the maximum number of connections or -EPERM is IUCV is not
* available.
*/
-static int iucv_query_maxconn(void)
+static int __iucv_query_maxconn(void *param, unsigned long *max_pathid)
{
register unsigned long reg0 asm ("0");
register unsigned long reg1 asm ("1");
- void *param;
int ccode;
- param = kzalloc(sizeof(union iucv_param), GFP_KERNEL|GFP_DMA);
- if (!param)
- return -ENOMEM;
reg0 = IUCV_QUERY;
reg1 = (unsigned long) param;
asm volatile (
@@ -362,8 +366,22 @@ static int iucv_query_maxconn(void)
" ipm %0\n"
" srl %0,28\n"
: "=d" (ccode), "+d" (reg0), "+d" (reg1) : : "cc");
+ *max_pathid = reg1;
+ return ccode;
+}
+
+static int iucv_query_maxconn(void)
+{
+ unsigned long max_pathid;
+ void *param;
+ int ccode;
+
+ param = kzalloc(sizeof(union iucv_param), GFP_KERNEL | GFP_DMA);
+ if (!param)
+ return -ENOMEM;
+ ccode = __iucv_query_maxconn(param, &max_pathid);
if (ccode == 0)
- iucv_max_pathid = reg1;
+ iucv_max_pathid = max_pathid;
kfree(param);
return ccode ? -EPERM : 0;
}