patch-1.3.93 linux/include/asm-sparc/atops.h

• Lines: 23
• Date: Sun Apr 21 12:30:33 1996
• Orig file: v1.3.92/linux/include/asm-sparc/atops.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.92/linux/include/asm-sparc/atops.h linux/include/asm-sparc/atops.h
@@ -0,0 +1,22 @@
+/* atops.h: Atomic SPARC operations.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+#ifndef _SPARC_ATOPS_H
+#define _SPARC_ATOPS_H
+
+#ifdef __SMP__
+
+extern __inline volatile unsigned char ldstub(volatile unsigned char *lock)
+{
+	volatile unsigned char retval;
+
+	__asm__ __volatile__("ldstub [%1], %0\n\t" :
+			     "=&r" (retval) :
+			     "r" (lock));
+	return retval;
+}
+
+#endif
+
+#endif