diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index b293265e548e..7f05d3f65844 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -109,6 +109,10 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0,
 asmlinkage int do_sys_sigstack(struct sigstack __user *ssptr,
                                struct sigstack __user *ossptr,
                                unsigned long sp);
+
+/* windows.c */
+void try_to_clear_window_buffer(struct pt_regs *regs, int who);
+
 #else /* CONFIG_SPARC32 */
 #endif /* CONFIG_SPARC32 */
 #endif /* !(__SPARC_KERNEL_H) */
diff --git a/arch/sparc/kernel/windows.c b/arch/sparc/kernel/windows.c
index 3107381e576d..87bab0a3857a 100644
--- a/arch/sparc/kernel/windows.c
+++ b/arch/sparc/kernel/windows.c
@@ -10,8 +10,11 @@
 #include <linux/mm.h>
 #include <linux/smp.h>
 
+#include <asm/cacheflush.h>
 #include <asm/uaccess.h>
 
+#include "kernel.h"
+
 /* Do save's until all user register windows are out of the cpu. */
 void flush_user_windows(void)
 {