It turned out that the following change is needed when the speaker is compiled as a module. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
@@ -1361,7 +1361,7 @@ struct seq_operations cpuinfo_op = {
.show = show_cpuinfo,
};
-#ifdef CONFIG_INPUT_PCSPKR
+#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
#include <linux/platform_device.h>
static __init int add_pcspkr(void)
{