sched: add declaration of sched_tail to sched.h

Avoids sparse warnings:
kernel/sched.c:2170:17: warning: symbol 'schedule_tail' was not declared. Should it be static?

Avoids the need for an external declaration in arch/um/process.c

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 2 deletions

diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index fc50d2f959d1..e8cb9ff183e9 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -128,8 +128,6 @@ void *get_current(void)
         return current;
 }
 
-extern void schedule_tail(struct task_struct *prev);
-
 /*
  * This is called magically, by its address being stuffed in a jmp_buf
  * and being longjmp-d to.