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s390: correct some inline assembly constraints

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Inline assembly code changed in this patch should really use "Q"
constraint "Memory reference without index register and with short
displacement". The kernel does not compile with kasan support enabled
otherwise (due to stack instrumentation).

Signed-off-by: Vasily Gorbik <gor@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Vasily Gorbik 2017-11-13 16:37:33 +01:00 committed by Heiko Carstens
parent 0aaba41b58
commit 11776eaa65
3 changed files with 4 additions and 4 deletions
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2
arch/s390/include/asm/cpu_mf.h
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@ -167,7 +167,7 @@ static inline int lcctl(u64 ctl)
" .insn s,0xb2840000,%1\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc) : "m" (ctl) : "cc");
: "=d" (cc) : "Q" (ctl) : "cc");
return cc;
}

4
arch/s390/include/asm/lowcore.h
View File

@ -188,14 +188,14 @@ extern struct lowcore *lowcore_ptr[];
static inline void set_prefix(__u32 address)
{
asm volatile("spx %0" : : "m" (address) : "memory");
asm volatile("spx %0" : : "Q" (address) : "memory");
}
static inline __u32 store_prefix(void)
{
__u32 address;
asm volatile("stpx %0" : "=m" (address));
asm volatile("stpx %0" : "=Q" (address));
return address;
}

2
arch/s390/include/asm/processor.h
View File

@ -245,7 +245,7 @@ static inline unsigned short stap(void)
{
unsigned short cpu_address;
asm volatile("stap %0" : "=m" (cpu_address));
asm volatile("stap %0" : "=Q" (cpu_address));
return cpu_address;
}