x86: GEODE: cache results from geode_has_vsa2() and uninline

This moves geode_has_vsa2 into a .c file, caches the result we get from
the VSA virtual registers, and causes the function to no longer be inline.

[akpm@linux-foundation.org: cleanup]
Signed-off-by: NAndres Salomon <dilinger@debian.org>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/geode_32.c

@@ -161,6 +161,25 @@ void geode_gpio_setup_event(unsigned int gpio, int pair, int pme)
 }
 EXPORT_SYMBOL_GPL(geode_gpio_setup_event);
 
+int geode_has_vsa2(void)
+{
+	static int has_vsa2 = -1;
+
+	if (has_vsa2 == -1) {
+		/*
+		 * The VSA has virtual registers that we can query for a
+		 * signature.
+		 */
+		outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
+		outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
+
+		has_vsa2 = (inw(VSA_VRC_DATA) == VSA_SIG);
+	}
+
+	return has_vsa2;
+}
+EXPORT_SYMBOL_GPL(geode_has_vsa2);
+
 static int __init geode_southbridge_init(void)
 {
 	if (!is_geode())

include/asm-x86/geode.h

@@ -185,16 +185,7 @@ static inline int is_geode(void)
 	return (is_geode_gx() || is_geode_lx());
 }
 
-/*
- * The VSA has virtual registers that we can query for a signature.
- */
-static inline int geode_has_vsa2(void)
-{
-	outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
-	outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX);
-
-	return (inw(VSA_VRC_DATA) == VSA_SIG);
-}
+extern int geode_has_vsa2(void);
 
 /* MFGPTs */