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s390/hypfs: use basic block for diag inline assembly 

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>
This commit is contained in:
Heiko Carstens 2016-06-20 14:06:09 +02:00 committed by Martin Schwidefsky
parent 2c79813a1f
commit e030c1125e
1 changed files with 7 additions and 5 deletions
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12
arch/s390/hypfs/hypfs_diag.c
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@ -337,9 +337,9 @@ static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr)
/* Diagnose 204 functions */
static inline int __diag204(unsigned long subcode, unsigned long size, void *addr)
static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
{
register unsigned long _subcode asm("0") = subcode;
register unsigned long _subcode asm("0") = *subcode;
register unsigned long _size asm("1") = size;
asm volatile(
@ -347,15 +347,17 @@ static inline int __diag204(unsigned long subcode, unsigned long size, void *add
"0: nopr %%r7\n"
EX_TABLE(0b,0b)
: "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
if (_subcode)
return -1;
*subcode = _subcode;
return _size;
}
static int diag204(unsigned long subcode, unsigned long size, void *addr)
{
diag_stat_inc(DIAG_STAT_X204);
return __diag204(subcode, size, addr);
size = __diag204(&subcode, size, addr);
if (subcode)
return -1;
return size;
}
/*