[tip: locking/core] locking/atomic: parisc: add preprocessor symbols

[tip-bot2 for Mark Rutland]

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     07bf3dcbe0e199422598f12918021c516161fd12
Gitweb:        https://git.kernel.org/tip/07bf3dcbe0e199422598f12918021c516161fd12
Author:        Mark Rutland <mark.rutland@xxxxxxx>
AuthorDate:    Mon, 05 Jun 2023 08:01:06 +01:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Mon, 05 Jun 2023 09:57:16 +02:00

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 <mark.rutland@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230605070124.3741859-10-mark.rutland@xxxxxxx
---
 arch/parisc/include/asm/atomic.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/parisc/include/asm/atomic.h b/arch/parisc/include/asm/atomic.h
index 0b3f64c..d4f0238 100644
--- a/arch/parisc/include/asm/atomic.h
+++ b/arch/parisc/include/asm/atomic.h
@@ -118,6 +118,11 @@ static __inline__ int arch_atomic_fetch_##op(int i, atomic_t *v)	\
 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)						\
@@ -127,6 +132,10 @@ 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
 #undef ATOMIC_OP_RETURN
@@ -181,6 +190,11 @@ static __inline__ s64 arch_atomic64_fetch_##op(s64 i, atomic64_t *v)	\
 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)						\
@@ -190,6 +204,10 @@ 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
 #undef ATOMIC64_OP_RETURN