locking/atomic: h8300: use asm-generic exclusively

As h8300's implementation of the atomics isn't using any arch-specific
functionality, and its implementation of cmpxchg only uses assembly to
non-atomically swap two elements in memory, we may as well use the
asm-generic atomic.h and cmpxchg.h, and avoid the duplicate code.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-4-mark.rutland@arm.com

1 files changed, 0 insertions, 97 deletions

diff --git a/arch/h8300/include/asm/atomic.h b/arch/h8300/include/asm/atomic.h
deleted file mode 100644
index a990d151f163..000000000000
--- a/arch/h8300/include/asm/atomic.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ARCH_H8300_ATOMIC__
-#define __ARCH_H8300_ATOMIC__
-
-#include <linux/compiler.h>
-#include <linux/types.h>
-#include <asm/cmpxchg.h>
-#include <asm/irqflags.h>
-
-/*
- * Atomic operations that C can't guarantee us.  Useful for
- * resource counting etc..
- */
-
-#define atomic_read(v)		READ_ONCE((v)->counter)
-#define atomic_set(v, i)	WRITE_ONCE(((v)->counter), (i))
-
-#define ATOMIC_OP_RETURN(op, c_op)				\
-static inline int atomic_##op##_return(int i, atomic_t *v)	\
-{								\
-	h8300flags flags;					\
-	int ret;						\
-								\
-	flags = arch_local_irq_save();				\
-	ret = v->counter c_op i;				\
-	arch_local_irq_restore(flags);				\
-	return ret;						\
-}
-
-#define ATOMIC_FETCH_OP(op, c_op)				\
-static inline int atomic_fetch_##op(int i, atomic_t *v)		\
-{								\
-	h8300flags flags;					\
-	int ret;						\
-								\
-	flags = arch_local_irq_save();				\
-	ret = v->counter;					\
-	v->counter c_op i;					\
-	arch_local_irq_restore(flags);				\
-	return ret;						\
-}
-
-#define ATOMIC_OP(op, c_op)					\
-static inline void atomic_##op(int i, atomic_t *v)		\
-{								\
-	h8300flags flags;					\
-								\
-	flags = arch_local_irq_save();				\
-	v->counter c_op i;					\
-	arch_local_irq_restore(flags);				\
-}
-
-ATOMIC_OP_RETURN(add, +=)
-ATOMIC_OP_RETURN(sub, -=)
-
-#define ATOMIC_OPS(op, c_op)					\
-	ATOMIC_OP(op, c_op)					\
-	ATOMIC_FETCH_OP(op, c_op)
-
-ATOMIC_OPS(and, &=)
-ATOMIC_OPS(or,  |=)
-ATOMIC_OPS(xor, ^=)
-ATOMIC_OPS(add, +=)
-ATOMIC_OPS(sub, -=)
-
-#undef ATOMIC_OPS
-#undef ATOMIC_OP_RETURN
-#undef ATOMIC_OP
-
-static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
-{
-	int ret;
-	h8300flags flags;
-
-	flags = arch_local_irq_save();
-	ret = v->counter;
-	if (likely(ret == old))
-		v->counter = new;
-	arch_local_irq_restore(flags);
-	return ret;
-}
-
-static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)
-{
-	int ret;
-	h8300flags flags;
-
-	flags = arch_local_irq_save();
-	ret = v->counter;
-	if (ret != u)
-		v->counter += a;
-	arch_local_irq_restore(flags);
-	return ret;
-}
-#define atomic_fetch_add_unless		atomic_fetch_add_unless
-
-#endif /* __ARCH_H8300_ATOMIC __ */