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Diffstat (limited to 'arch/x86/include/asm/atomic64_32.h')
-rw-r--r--arch/x86/include/asm/atomic64_32.h25
1 files changed, 22 insertions, 3 deletions
diff --git a/arch/x86/include/asm/atomic64_32.h b/arch/x86/include/asm/atomic64_32.h
index a984111135b1..71d7705fb303 100644
--- a/arch/x86/include/asm/atomic64_32.h
+++ b/arch/x86/include/asm/atomic64_32.h
@@ -320,10 +320,29 @@ static inline void atomic64_##op(long long i, atomic64_t *v) \
c = old; \
}
-ATOMIC64_OP(and, &)
-ATOMIC64_OP(or, |)
-ATOMIC64_OP(xor, ^)
+#define ATOMIC64_FETCH_OP(op, c_op) \
+static inline long long atomic64_fetch_##op(long long i, atomic64_t *v) \
+{ \
+ long long old, c = 0; \
+ while ((old = atomic64_cmpxchg(v, c, c c_op i)) != c) \
+ c = old; \
+ return old; \
+}
+
+ATOMIC64_FETCH_OP(add, +)
+
+#define atomic64_fetch_sub(i, v) atomic64_fetch_add(-(i), (v))
+
+#define ATOMIC64_OPS(op, c_op) \
+ ATOMIC64_OP(op, c_op) \
+ ATOMIC64_FETCH_OP(op, c_op)
+
+ATOMIC64_OPS(and, &)
+ATOMIC64_OPS(or, |)
+ATOMIC64_OPS(xor, ^)
+#undef ATOMIC64_OPS
+#undef ATOMIC64_FETCH_OP
#undef ATOMIC64_OP
#endif /* _ASM_X86_ATOMIC64_32_H */