Changeset 59e4864 in mainline for kernel/arch/ia64/include/atomic.h

Timestamp:

2008-11-11T08:00:42Z (17 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f3c4a26

Parents:

a2a5529

Message:

Alfa of SMP support on IA64

File:

• kernel/arch/ia64/include/atomic.h (modified) (1 diff)

kernel/arch/ia64/include/atomic.h

@@ -52 +52 @@
 }
 
+
+static inline uint64_t test_and_set(atomic_t *val) {
+        uint64_t v;
+                
+        asm volatile (
+                "movl %0=0x01;;\n"
+                "xchg8 %0=%1,%0;;\n"
+                : "=r" (v),"+m" (val->count)
+        );
+        
+        return v;
+}
+
+
 static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
 static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }