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author | Eric Paris <eparis@redhat.com> | 2014-03-07 11:41:32 -0500 |
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committer | Eric Paris <eparis@redhat.com> | 2014-03-07 11:41:32 -0500 |
commit | b7d3622a39fde7658170b7f3cf6c6889bb8db30d (patch) | |
tree | 64f4e781ecb2a85d675e234072b988560bcd25f1 /arch/arm/include/asm/cmpxchg.h | |
parent | audit: whitespace fix in kernel-parameters.txt (diff) | |
parent | Linux 3.13 (diff) | |
download | linux-dev-b7d3622a39fde7658170b7f3cf6c6889bb8db30d.tar.xz linux-dev-b7d3622a39fde7658170b7f3cf6c6889bb8db30d.zip |
Merge tag 'v3.13' into for-3.15
Linux 3.13
Conflicts:
include/net/xfrm.h
Simple merge where v3.13 removed 'extern' from definitions and the audit
tree did s/u32/unsigned int/ to the same definitions.
Diffstat (limited to 'arch/arm/include/asm/cmpxchg.h')
-rw-r--r-- | arch/arm/include/asm/cmpxchg.h | 58 |
1 files changed, 46 insertions, 12 deletions
diff --git a/arch/arm/include/asm/cmpxchg.h b/arch/arm/include/asm/cmpxchg.h index 4f009c10540d..df2fbba7efc8 100644 --- a/arch/arm/include/asm/cmpxchg.h +++ b/arch/arm/include/asm/cmpxchg.h @@ -223,6 +223,42 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr, return ret; } +static inline unsigned long long __cmpxchg64(unsigned long long *ptr, + unsigned long long old, + unsigned long long new) +{ + unsigned long long oldval; + unsigned long res; + + __asm__ __volatile__( +"1: ldrexd %1, %H1, [%3]\n" +" teq %1, %4\n" +" teqeq %H1, %H4\n" +" bne 2f\n" +" strexd %0, %5, %H5, [%3]\n" +" teq %0, #0\n" +" bne 1b\n" +"2:" + : "=&r" (res), "=&r" (oldval), "+Qo" (*ptr) + : "r" (ptr), "r" (old), "r" (new) + : "cc"); + + return oldval; +} + +static inline unsigned long long __cmpxchg64_mb(unsigned long long *ptr, + unsigned long long old, + unsigned long long new) +{ + unsigned long long ret; + + smp_mb(); + ret = __cmpxchg64(ptr, old, new); + smp_mb(); + + return ret; +} + #define cmpxchg_local(ptr,o,n) \ ((__typeof__(*(ptr)))__cmpxchg_local((ptr), \ (unsigned long)(o), \ @@ -230,18 +266,16 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr, sizeof(*(ptr)))) #define cmpxchg64(ptr, o, n) \ - ((__typeof__(*(ptr)))atomic64_cmpxchg(container_of((ptr), \ - atomic64_t, \ - counter), \ - (unsigned long long)(o), \ - (unsigned long long)(n))) - -#define cmpxchg64_local(ptr, o, n) \ - ((__typeof__(*(ptr)))local64_cmpxchg(container_of((ptr), \ - local64_t, \ - a), \ - (unsigned long long)(o), \ - (unsigned long long)(n))) + ((__typeof__(*(ptr)))__cmpxchg64_mb((ptr), \ + (unsigned long long)(o), \ + (unsigned long long)(n))) + +#define cmpxchg64_relaxed(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg64((ptr), \ + (unsigned long long)(o), \ + (unsigned long long)(n))) + +#define cmpxchg64_local(ptr, o, n) cmpxchg64_relaxed((ptr), (o), (n)) #endif /* __LINUX_ARM_ARCH__ >= 6 */ |