[RFC PATCH v3 3/6] riscv/cmpxchg: Deduplicate arch_cmpxchg() macros

[Leonardo Bras]

Every arch_cmpxchg define (_relaxed, _acquire, _release, vanilla) contain
it's own define for creating tmp variables and calling the correct internal
macro for the desired version.

Those defines are mostly the same code, so there is no need to keep the 4
copies.

Create a helper define to avoid code duplication.

(This did not cause any change in generated asm)

Signed-off-by: Leonardo Bras <leobras at redhat.com>
---
 arch/riscv/include/asm/cmpxchg.h | 30 +++++++++---------------------
 1 file changed, 9 insertions(+), 21 deletions(-)

diff --git a/arch/riscv/include/asm/cmpxchg.h b/arch/riscv/include/asm/cmpxchg.h
index f76a82274a4fd..f88fae357071c 100644
--- a/arch/riscv/include/asm/cmpxchg.h
+++ b/arch/riscv/include/asm/cmpxchg.h
@@ -204,46 +204,34 @@
 #define __cmpxchg_relaxed(ptr, old, new, size)				\
 	___cmpxchg(ptr, old, new, size, "", "", "")
 
-#define arch_cmpxchg_relaxed(ptr, o, n)					\
+#define _arch_cmpxchg(order, ptr, o, n)					\
 ({									\
 	__typeof__(*(ptr)) _o_ = (o);					\
 	__typeof__(*(ptr)) _n_ = (n);					\
-	(__typeof__(*(ptr))) __cmpxchg_relaxed((ptr),			\
-					_o_, _n_, sizeof(*(ptr)));	\
+	(__typeof__(*(ptr))) __cmpxchg ## order((ptr), _o_, _n_,	\
+						sizeof(*(ptr)));	\
 })
 
+#define arch_cmpxchg_relaxed(ptr, o, n)					\
+	_arch_cmpxchg(_relaxed, ptr, o, n)
+
 #define __cmpxchg_acquire(ptr, old, new, size)				\
 	___cmpxchg(ptr, old, new, size, "", "", RISCV_ACQUIRE_BARRIER)
 
 #define arch_cmpxchg_acquire(ptr, o, n)					\
-({									\
-	__typeof__(*(ptr)) _o_ = (o);					\
-	__typeof__(*(ptr)) _n_ = (n);					\
-	(__typeof__(*(ptr))) __cmpxchg_acquire((ptr),			\
-					_o_, _n_, sizeof(*(ptr)));	\
-})
+	_arch_cmpxchg(_acquire, ptr, o, n)
 
 #define __cmpxchg_release(ptr, old, new, size)				\
 	___cmpxchg(ptr, old, new, size, "", RISCV_RELEASE_BARRIER, "")
 
 #define arch_cmpxchg_release(ptr, o, n)					\
-({									\
-	__typeof__(*(ptr)) _o_ = (o);					\
-	__typeof__(*(ptr)) _n_ = (n);					\
-	(__typeof__(*(ptr))) __cmpxchg_release((ptr),			\
-					_o_, _n_, sizeof(*(ptr)));	\
-})
+	_arch_cmpxchg(_release, ptr, o, n)
 
 #define __cmpxchg(ptr, old, new, size)					\
 	___cmpxchg(ptr, old, new, size, ".rl", "", "	fence rw, rw\n")
 
 #define arch_cmpxchg(ptr, o, n)						\
-({									\
-	__typeof__(*(ptr)) _o_ = (o);					\
-	__typeof__(*(ptr)) _n_ = (n);					\
-	(__typeof__(*(ptr))) __cmpxchg((ptr),				\
-				       _o_, _n_, sizeof(*(ptr)));	\
-})
+	_arch_cmpxchg(, ptr, o, n)
 
 #define arch_cmpxchg_local(ptr, o, n)					\
 	(__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr))))
-- 
2.40.0