kill stray kernel_thread() garbage

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c
index 7005707..b727e69 100644
--- a/arch/m32r/kernel/m32r_ksyms.c
+++ b/arch/m32r/kernel/m32r_ksyms.c
@@ -21,7 +21,6 @@
 EXPORT_SYMBOL(dump_fpu);
 EXPORT_SYMBOL(__ioremap);
 EXPORT_SYMBOL(iounmap);
-EXPORT_SYMBOL(kernel_thread);
 
 EXPORT_SYMBOL(strncpy_from_user);
 EXPORT_SYMBOL(__strncpy_from_user);
diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h
index 43decdb..3369138 100644
--- a/arch/openrisc/include/asm/processor.h
+++ b/arch/openrisc/include/asm/processor.h
@@ -81,8 +81,6 @@
 #define KSTK_ESP(tsk)   (task_pt_regs(tsk)->sp)
 
 
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
 void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
 void release_thread(struct task_struct *);
 unsigned long get_wchan(struct task_struct *p);
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index 0e8b7b8..09b54a5 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -326,7 +326,6 @@
 
 /* Free all resources held by a thread. */
 extern void release_thread(struct task_struct *);
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 
 extern void map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm);
 
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
index 879073e..2b70dfb 100644
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@@ -220,8 +220,6 @@
 	/* Nothing for now */
 }
 
-extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-
 extern int do_work_pending(struct pt_regs *regs, u32 flags);