Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

arch/sh64/kernel/led.c

@@ -0,0 +1,41 @@
+/*
+ * arch/sh64/kernel/led.c
+ *
+ * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com>
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * Flash the LEDs
+ */
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+
+void mach_led(int pos, int val);
+
+/* acts like an actual heart beat -- ie thump-thump-pause... */
+void heartbeat(void)
+{
+	static unsigned int cnt = 0, period = 0, dist = 0;
+
+	if (cnt == 0 || cnt == dist) {
+		mach_led(-1, 1);
+	} else if (cnt == 7 || cnt == dist + 7) {
+		mach_led(-1, 0);
+	}
+
+	if (++cnt > period) {
+		cnt = 0;
+
+		/*
+		 * The hyperbolic function below modifies the heartbeat period
+		 * length in dependency of the current (5min) load. It goes
+		 * through the points f(0)=126, f(1)=86, f(5)=51, f(inf)->30.
+		 */
+		period = ((672 << FSHIFT) / (5 * avenrun[0] +
+					    (7 << FSHIFT))) + 30;
+		dist = period / 4;
+	}
+}
+