[ltt-dev] [PATCH 07/12] use uatomic_defaults.h for common fallback implementations

[Paolo Bonzini]

And now, really remove the code for S390/SPARC, using the fallback
implementation of uatomic_defaults.h.

We keep custom per-arch macros to provide support for compilers back to
early GCC 3.x versions; however future ports may not support this at least
in the beginning, and unknown architectures will always try using the
GCC builtins.

Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
---
 urcu/uatomic_arch_s390.h    |   42 ----------------------
 urcu/uatomic_arch_sparc64.h |   83 -------------------------------------------
 2 files changed, 0 insertions(+), 125 deletions(-)

diff --git a/urcu/uatomic_arch_s390.h b/urcu/uatomic_arch_s390.h
index 8f1523c..2f9b532 100644
--- a/urcu/uatomic_arch_s390.h
+++ b/urcu/uatomic_arch_s390.h
@@ -163,48 +163,6 @@ unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
 					       (unsigned long)(_new),	\
 					       sizeof(*(addr)))
 
-/* uatomic_add_return */
-
-static inline __attribute__((always_inline))
-unsigned long _uatomic_add_return(void *addr, unsigned long val, int len)
-{
-	switch (len) {
-	case 4:
-	{
-		unsigned int old, oldt;
-
-		oldt = uatomic_read((unsigned int *)addr);
-		do {
-			old = oldt;
-			oldt = _uatomic_cmpxchg(addr, old, old + val, 4);
-		} while (oldt != old);
-
-		return old + val;
-	}
-#if (BITS_PER_LONG == 64)
-	case 8:
-	{
-		unsigned long old, oldt;
-
-		oldt = uatomic_read((unsigned long *)addr);
-		do {
-			old = oldt;
-			oldt = _uatomic_cmpxchg(addr, old, old + val, 8);
-		} while (oldt != old);
-
-		return old + val;
-	}
-#endif
-	}
-	__builtin_trap();
-	return 0;
-}
-
-#define uatomic_add_return(addr, v)					\
-	((__typeof__(*(addr))) _uatomic_add_return((addr),		\
-						  (unsigned long)(v),	\
-						  sizeof(*(addr))))
-
 #ifdef __cplusplus 
 }
 #endif
diff --git a/urcu/uatomic_arch_sparc64.h b/urcu/uatomic_arch_sparc64.h
index 0c16eaf..ef6572e 100644
--- a/urcu/uatomic_arch_sparc64.h
+++ b/urcu/uatomic_arch_sparc64.h
@@ -83,89 +83,6 @@ unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
 						(unsigned long)(_new), 	    \
 						sizeof(*(addr))))
 
-/* xchg */
-
-static inline __attribute__((always_inline))
-unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
-{
-	switch (len) {
-	case 4:
-	{
-		unsigned int old, oldt;
-
-		oldt = uatomic_read((unsigned int *)addr);
-		do {
-			old = oldt;
-			oldt = _uatomic_cmpxchg(addr, old, val, 4);
-		} while (oldt != old);
-
-		return old;
-	}
-#if (BITS_PER_LONG == 64)
-	case 8:
-	{
-		unsigned long old, oldt;
-
-		oldt = uatomic_read((unsigned long *)addr);
-		do {
-			old = oldt;
-			oldt = _uatomic_cmpxchg(addr, old, val, 8);
-		} while (oldt != old);
-
-		return old;
-	}
-#endif
-	}
-	__builtin_trap();
-	return 0;
-}
-
-#define uatomic_xchg(addr, v)						    \
-	((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
-						sizeof(*(addr))))
-
-/* uatomic_add_return */
-
-static inline __attribute__((always_inline))
-unsigned long _uatomic_add_return(void *addr, unsigned long val, int len)
-{
-	switch (len) {
-	case 4:
-	{
-		unsigned int old, oldt;
-
-		oldt = uatomic_read((unsigned int *)addr);
-		do {
-			old = oldt;
-			oldt = _uatomic_cmpxchg(addr, old, old + val, 4);
-		} while (oldt != old);
-
-		return old + val;
-	}
-#if (BITS_PER_LONG == 64)
-	case 8:
-	{
-		unsigned long old, oldt;
-
-		oldt = uatomic_read((unsigned long *)addr);
-		do {
-			old = oldt;
-			oldt = _uatomic_cmpxchg(addr, old, old + val, 8);
-		} while (oldt != old);
-
-		return old + val;
-	}
-#endif
-	}
-	__builtin_trap();
-	return 0;
-}
-
-#define uatomic_add_return(addr, v)					\
-	((__typeof__(*(addr))) _uatomic_add_return((addr),		\
-						  (unsigned long)(v),	\
-						  sizeof(*(addr))))
-
 #ifdef __cplusplus 
 }
 #endif
-- 
1.6.6