1 files changed, 7 insertions, 6 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 39d35935b371..7be283d98983 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -27,6 +27,7 @@
 #include <linux/mempolicy.h>
 #include <linux/cpuset.h>
 #include <linux/syscalls.h>
+#include <linux/signal.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -38,6 +39,8 @@ extern struct task_struct *child_reaper;
 
 int getrusage(struct task_struct *, int, struct rusage __user *);
 
+static void exit_mm(struct task_struct * tsk);
+
 static void __unhash_process(struct task_struct *p)
 {
         nr_threads--;
@@ -209,7 +212,7 @@ static inline int has_stopped_jobs(int pgrp)
 }
 
 /**
- * reparent_to_init() - Reparent the calling kernel thread to the init task.
+ * reparent_to_init - Reparent the calling kernel thread to the init task.
  *
  * If a kernel thread is launched as a result of a system call, or if
  * it ever exits, it should generally reparent itself to init so that
@@ -277,7 +280,7 @@ void set_special_pids(pid_t session, pid_t pgrp)
  */
 int allow_signal(int sig)
 {
-        if (sig < 1 || sig > _NSIG)
+        if (!valid_signal(sig) || sig < 1)
                 return -EINVAL;
 
         spin_lock_irq(&current->sighand->siglock);
@@ -298,7 +301,7 @@ EXPORT_SYMBOL(allow_signal);
 
 int disallow_signal(int sig)
 {
-        if (sig < 1 || sig > _NSIG)
+        if (!valid_signal(sig) || sig < 1)
                 return -EINVAL;
 
         spin_lock_irq(&current->sighand->siglock);
@@ -473,7 +476,7 @@ EXPORT_SYMBOL_GPL(exit_fs);
  * Turn us into a lazy TLB process if we
  * aren't already..
  */
-void exit_mm(struct task_struct * tsk)
+static void exit_mm(struct task_struct * tsk)
 {
         struct mm_struct *mm = tsk->mm;
 
@@ -517,8 +520,6 @@ static inline void choose_new_parent(task_t *p, task_t *reaper, task_t *child_re
          */
         BUG_ON(p == reaper || reaper->exit_state >= EXIT_ZOMBIE);
         p->real_parent = reaper;
-        if (p->parent == p->real_parent)
-                BUG();
 }
 
 static inline void reparent_thread(task_t *p, task_t *father, int traced)