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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-10-12 16:11:41 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-10-12 16:13:08 +0200 |
| commit | 210d3a90ce665509e4852977d7a3352654e5e990 (patch) | |
| tree | db757ee80cd43e0c083830f9815a86f3a5a4b89c /include/asm-s390 | |
| parent | c622498e5c82217cda7f661eebbabdaad0814659 (diff) | |
| download | linux-stable-210d3a90ce665509e4852977d7a3352654e5e990.tar.gz linux-stable-210d3a90ce665509e4852977d7a3352654e5e990.tar.bz2 linux-stable-210d3a90ce665509e4852977d7a3352654e5e990.zip | |
[S390] Force link error if xchg/cmpxchg gets called with unsupported size.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include/asm-s390')
| -rw-r--r-- | include/asm-s390/system.h | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/include/asm-s390/system.h b/include/asm-s390/system.h index 64a3cd05cae1..d866d3385556 100644 --- a/include/asm-s390/system.h +++ b/include/asm-s390/system.h @@ -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; } /* |