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-rw-r--r--exec.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/exec.h b/exec.h
index 5c4e841a72..54571a232a 100644
--- a/exec.h
+++ b/exec.h
@@ -348,6 +348,18 @@ static inline int testandset (int *spinlock)
}
#endif
+#ifdef __mc68000
+static inline int testandset (int *p)
+{
+ char ret;
+ __asm__ __volatile__("tas %1; sne %0"
+ : "=r" (ret)
+ : "m" (p)
+ : "cc","memory");
+ return ret == 0;
+}
+#endif
+
typedef int spinlock_t;
#define SPIN_LOCK_UNLOCKED 0