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From:   Mark Rutland <mark.rutland@arm.com>
To:     linux-kernel@vger.kernel.org
Cc:     akiyks@gmail.com, boqun.feng@gmail.com, corbet@lwn.net,
        keescook@chromium.org, linux@armlinux.org.uk,
        linux-doc@vger.kernel.org, mark.rutland@arm.com,
        mchehab@kernel.org, paulmck@kernel.org, peterz@infradead.org,
        rdunlap@infradead.org, sstabellini@kernel.org, will@kernel.org
Subject: [PATCH v2 09/27] locking/atomic: parisc: add preprocessor symbols
Date:   Mon,  5 Jun 2023 08:01:06 +0100
Message-Id: <20230605070124.3741859-10-mark.rutland@arm.com>
In-Reply-To: <20230605070124.3741859-1-mark.rutland@arm.com>
References: <20230605070124.3741859-1-mark.rutland@arm.com>
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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@arm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
---
 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 0b3f64c92e3c0..d4f023887ff87 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
-- 
2.30.2