locking/atomic: parisc: add preprocessor symbols

Some atomics can be implemented in several different ways, e.g.
FULL/ACQUIRE/RELEASE ordered atomics can be implemented in terms of
RELAXED atomics, and ACQUIRE/RELEASE/RELAXED can be implemented in terms
of FULL ordered atomics. Other atomics are optional, and don't exist in
some configurations (e.g. not all architectures implement the 128-bit
cmpxchg ops).

Subsequent patches will require that architectures define a preprocessor
symbol for any atomic (or ordering variant) which is optional. This will
make the fallback ifdeffery more robust, and simplify future changes.

Add the required definitions to arch/parisc.

Signed-off-by: Mark Rutland <[e-mail]>
Signed-off-by: Peter Zijlstra (Intel) <[e-mail]>
Reviewed-by: Kees Cook <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/parisc/include/asm/atomic.h

···
 ATOMIC_OPS(add, +=)
 ATOMIC_OPS(sub, -=)
 
+#define arch_atomic_add_return	arch_atomic_add_return
+#define arch_atomic_sub_return	arch_atomic_sub_return
+#define arch_atomic_fetch_add	arch_atomic_fetch_add
+#define arch_atomic_fetch_sub	arch_atomic_fetch_sub
+
 #undef ATOMIC_OPS
 #define ATOMIC_OPS(op, c_op)						\
 	ATOMIC_OP(op, c_op)						\
···
 ATOMIC_OPS(and, &=)
 ATOMIC_OPS(or, |=)
 ATOMIC_OPS(xor, ^=)
+
+#define arch_atomic_fetch_and	arch_atomic_fetch_and
+#define arch_atomic_fetch_or	arch_atomic_fetch_or
+#define arch_atomic_fetch_xor	arch_atomic_fetch_xor
 
 #undef ATOMIC_OPS
 #undef ATOMIC_FETCH_OP
···
 ATOMIC64_OPS(add, +=)
 ATOMIC64_OPS(sub, -=)
 
+#define arch_atomic64_add_return	arch_atomic64_add_return
+#define arch_atomic64_sub_return	arch_atomic64_sub_return
+#define arch_atomic64_fetch_add		arch_atomic64_fetch_add
+#define arch_atomic64_fetch_sub		arch_atomic64_fetch_sub
+
 #undef ATOMIC64_OPS
 #define ATOMIC64_OPS(op, c_op)						\
 	ATOMIC64_OP(op, c_op)						\
···
 ATOMIC64_OPS(and, &=)
 ATOMIC64_OPS(or, |=)
 ATOMIC64_OPS(xor, ^=)
+
+#define arch_atomic64_fetch_and		arch_atomic64_fetch_and
+#define arch_atomic64_fetch_or		arch_atomic64_fetch_or
+#define arch_atomic64_fetch_xor		arch_atomic64_fetch_xor
 
 #undef ATOMIC64_OPS
 #undef ATOMIC64_FETCH_OP