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s390/smp: use basic blocks for sigp inline assemblies

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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 14:04:17 +02:00
committed by Martin Schwidefsky
parent a4d9b97cc3
commit 80a60f6ef1
2 changed files with 15 additions and 10 deletions
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17
arch/s390/include/asm/sigp.h
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@@ -37,8 +37,8 @@
#ifndef __ASSEMBLY__
static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
u32 *status)
static inline int ____pcpu_sigp(u16 addr, u8 order, unsigned long parm,
u32 *status)
{
register unsigned long reg1 asm ("1") = parm;
int cc;
@@ -48,8 +48,19 @@ static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc), "+d" (reg1) : "d" (addr), "a" (order) : "cc");
*status = reg1;
return cc;
}
static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
u32 *status)
{
u32 _status;
int cc;
cc = ____pcpu_sigp(addr, order, parm, &_status);
if (status && cc == 1)
*status = reg1;
*status = _status;
return cc;
}