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Date:   Tue, 06 Jun 2023 08:26:22 -0000
From:   "tip-bot2 for Mark Rutland" <tip-bot2@linutronix.de>
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Subject: [tip: locking/core] locking/atomic: sh: add preprocessor symbols
Cc:     Mark Rutland <mark.rutland@arm.com>,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        Kees Cook <keescook@chromium.org>, x86@kernel.org,
        linux-kernel@vger.kernel.org
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The following commit has been merged into the locking/core branch of tip:

Commit-ID:     770345adc38485c688e5d832d82306a4c2da828c
Gitweb:        https://git.kernel.org/tip/770345adc38485c688e5d832d82306a4c2da828c
Author:        Mark Rutland <mark.rutland@arm.com>
AuthorDate:    Mon, 05 Jun 2023 08:01:07 +01:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Mon, 05 Jun 2023 09:57:16 +02:00

locking/atomic: sh: 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/sh.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-11-mark.rutland@arm.com
---
 arch/sh/include/asm/atomic-grb.h  |  9 +++++++++
 arch/sh/include/asm/atomic-irq.h  |  9 +++++++++
 arch/sh/include/asm/atomic-llsc.h |  9 +++++++++
 3 files changed, 27 insertions(+)

diff --git a/arch/sh/include/asm/atomic-grb.h b/arch/sh/include/asm/atomic-grb.h
index 059791f..cf1c10f 100644
--- a/arch/sh/include/asm/atomic-grb.h
+++ b/arch/sh/include/asm/atomic-grb.h
@@ -71,6 +71,11 @@ 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) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
 
@@ -78,6 +83,10 @@ 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
diff --git a/arch/sh/include/asm/atomic-irq.h b/arch/sh/include/asm/atomic-irq.h
index 7665de9..b4090cc 100644
--- a/arch/sh/include/asm/atomic-irq.h
+++ b/arch/sh/include/asm/atomic-irq.h
@@ -55,6 +55,11 @@ 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)						\
@@ -64,6 +69,10 @@ 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
diff --git a/arch/sh/include/asm/atomic-llsc.h b/arch/sh/include/asm/atomic-llsc.h
index b63dcfb..9ef1fb1 100644
--- a/arch/sh/include/asm/atomic-llsc.h
+++ b/arch/sh/include/asm/atomic-llsc.h
@@ -73,6 +73,11 @@ 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) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
 
@@ -80,6 +85,10 @@ 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