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Diffstat (limited to 'arch/arm64/include/asm/atomic.h')
-rw-r--r--arch/arm64/include/asm/atomic.h29
1 files changed, 20 insertions, 9 deletions
diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h
index 01de5aa..e32893e 100644
--- a/arch/arm64/include/asm/atomic.h
+++ b/arch/arm64/include/asm/atomic.h
@@ -64,7 +64,7 @@ static inline int atomic_add_return(int i, atomic_t *v)
int result;
asm volatile("// atomic_add_return\n"
-"1: ldaxr %w0, %2\n"
+"1: ldxr %w0, %2\n"
" add %w0, %w0, %w3\n"
" stlxr %w1, %w0, %2\n"
" cbnz %w1, 1b"
@@ -72,6 +72,7 @@ static inline int atomic_add_return(int i, atomic_t *v)
: "Ir" (i)
: "cc", "memory");
+ smp_mb();
return result;
}
@@ -96,7 +97,7 @@ static inline int atomic_sub_return(int i, atomic_t *v)
int result;
asm volatile("// atomic_sub_return\n"
-"1: ldaxr %w0, %2\n"
+"1: ldxr %w0, %2\n"
" sub %w0, %w0, %w3\n"
" stlxr %w1, %w0, %2\n"
" cbnz %w1, 1b"
@@ -104,6 +105,7 @@ static inline int atomic_sub_return(int i, atomic_t *v)
: "Ir" (i)
: "cc", "memory");
+ smp_mb();
return result;
}
@@ -112,17 +114,20 @@ static inline int atomic_cmpxchg(atomic_t *ptr, int old, int new)
unsigned long tmp;
int oldval;
+ smp_mb();
+
asm volatile("// atomic_cmpxchg\n"
-"1: ldaxr %w1, %2\n"
+"1: ldxr %w1, %2\n"
" cmp %w1, %w3\n"
" b.ne 2f\n"
-" stlxr %w0, %w4, %2\n"
+" stxr %w0, %w4, %2\n"
" cbnz %w0, 1b\n"
"2:"
: "=&r" (tmp), "=&r" (oldval), "+Q" (ptr->counter)
: "Ir" (old), "r" (new)
: "cc", "memory");
+ smp_mb();
return oldval;
}
@@ -183,7 +188,7 @@ static inline long atomic64_add_return(long i, atomic64_t *v)
unsigned long tmp;
asm volatile("// atomic64_add_return\n"
-"1: ldaxr %0, %2\n"
+"1: ldxr %0, %2\n"
" add %0, %0, %3\n"
" stlxr %w1, %0, %2\n"
" cbnz %w1, 1b"
@@ -191,6 +196,7 @@ static inline long atomic64_add_return(long i, atomic64_t *v)
: "Ir" (i)
: "cc", "memory");
+ smp_mb();
return result;
}
@@ -215,7 +221,7 @@ static inline long atomic64_sub_return(long i, atomic64_t *v)
unsigned long tmp;
asm volatile("// atomic64_sub_return\n"
-"1: ldaxr %0, %2\n"
+"1: ldxr %0, %2\n"
" sub %0, %0, %3\n"
" stlxr %w1, %0, %2\n"
" cbnz %w1, 1b"
@@ -223,6 +229,7 @@ static inline long atomic64_sub_return(long i, atomic64_t *v)
: "Ir" (i)
: "cc", "memory");
+ smp_mb();
return result;
}
@@ -231,17 +238,20 @@ static inline long atomic64_cmpxchg(atomic64_t *ptr, long old, long new)
long oldval;
unsigned long res;
+ smp_mb();
+
asm volatile("// atomic64_cmpxchg\n"
-"1: ldaxr %1, %2\n"
+"1: ldxr %1, %2\n"
" cmp %1, %3\n"
" b.ne 2f\n"
-" stlxr %w0, %4, %2\n"
+" stxr %w0, %4, %2\n"
" cbnz %w0, 1b\n"
"2:"
: "=&r" (res), "=&r" (oldval), "+Q" (ptr->counter)
: "Ir" (old), "r" (new)
: "cc", "memory");
+ smp_mb();
return oldval;
}
@@ -253,11 +263,12 @@ static inline long atomic64_dec_if_positive(atomic64_t *v)
unsigned long tmp;
asm volatile("// atomic64_dec_if_positive\n"
-"1: ldaxr %0, %2\n"
+"1: ldxr %0, %2\n"
" subs %0, %0, #1\n"
" b.mi 2f\n"
" stlxr %w1, %0, %2\n"
" cbnz %w1, 1b\n"
+" dmb ish\n"
"2:"
: "=&r" (result), "=&r" (tmp), "+Q" (v->counter)
:
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