Commit 210d3a90 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] Force link error if xchg/cmpxchg gets called with unsupported size.


Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent c622498e
......@@ -130,6 +130,8 @@ extern void pfault_fini(void);
__ret; \
})
extern void __xchg_called_with_bad_pointer(void);
static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
{
unsigned long addr, old;
......@@ -150,8 +152,7 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
: "=&d" (old), "=m" (*(int *) addr)
: "d" (x << shift), "d" (~(255 << shift)), "a" (addr),
"m" (*(int *) addr) : "memory", "cc", "0");
x = old >> shift;
break;
return old >> shift;
case 2:
addr = (unsigned long) ptr;
shift = (2 ^ (addr & 2)) << 3;
......@@ -166,8 +167,7 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
: "=&d" (old), "=m" (*(int *) addr)
: "d" (x << shift), "d" (~(65535 << shift)), "a" (addr),
"m" (*(int *) addr) : "memory", "cc", "0");
x = old >> shift;
break;
return old >> shift;
case 4:
asm volatile(
" l %0,0(%3)\n"
......@@ -176,8 +176,7 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
: "=&d" (old), "=m" (*(int *) ptr)
: "d" (x), "a" (ptr), "m" (*(int *) ptr)
: "memory", "cc");
x = old;
break;
return old;
#ifdef __s390x__
case 8:
asm volatile(
......@@ -187,11 +186,11 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
: "=&d" (old), "=m" (*(long *) ptr)
: "d" (x), "a" (ptr), "m" (*(long *) ptr)
: "memory", "cc");
x = old;
break;
return old;
#endif /* __s390x__ */
}
return x;
}
__xchg_called_with_bad_pointer();
return x;
}
/*
......@@ -206,6 +205,8 @@ static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
(unsigned long)(n),sizeof(*(ptr))))
extern void __cmpxchg_called_with_bad_pointer(void);
static inline unsigned long
__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
{
......@@ -270,7 +271,8 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
return prev;
#endif /* __s390x__ */
}
return old;
__cmpxchg_called_with_bad_pointer();
return old;
}
/*
......
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