@@ -56,8 +56,10 @@ inline static int tsl(fl_lock_t* lock)

 #elif defined __armv4l

 	asm volatile(

-			"swp [%1], %0 \n\t"

-			"=r" (val), "=m" (*lock): "0" (val) : "memory"

+			"# here \n\t"

+			"swpb %0, %1, [%2] \n\t"

+			: "=r" (val)

+			: "r"(1), "r" (lock) : "memory"

 	);

 #else

@@ -108,7 +110,10 @@ inline static void release_lock(fl_lock_t* lock)

 	);

 #elif defined __armv4l

 	asm volatile(

-		"mov $0, [%0]" : /*no output*/: "r"(lock): "memory"

+		" str %0, [%1] \n\r" 

+		: /*no outputs*/ 

+		: "r"(0), "r"(lock)

+		: "memory"

 	);

 #else

 #error "unknown arhitecture"