1 files changed, 29 insertions, 20 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index ee515683b92d..f8e609ff1893 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -10,6 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/smp_lock.h>
 #include <linux/module.h>
+#include <linux/capability.h>
 #include <linux/completion.h>
 #include <linux/personality.h>
 #include <linux/tty.h>
@@ -29,6 +30,7 @@
 #include <linux/syscalls.h>
 #include <linux/signal.h>
 #include <linux/cn_proc.h>
+#include <linux/mutex.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -72,7 +74,6 @@ repeat:
                 __ptrace_unlink(p);
         BUG_ON(!list_empty(&p->ptrace_list) || !list_empty(&p->ptrace_children));
         __exit_signal(p);
-        __exit_sighand(p);
         /*
          * Note that the fastpath in sys_times depends on __exit_signal having
          * updated the counters before a task is removed from the tasklist of
@@ -258,7 +259,7 @@ static inline void reparent_to_init(void)
 
 void __set_special_pids(pid_t session, pid_t pgrp)
 {
-        struct task_struct *curr = current;
+        struct task_struct *curr = current->group_leader;
 
         if (curr->signal->session != session) {
                 detach_pid(curr, PIDTYPE_SID);
@@ -842,7 +843,7 @@ fastcall NORET_TYPE void do_exit(long code)
         }
         group_dead = atomic_dec_and_test(&tsk->signal->live);
         if (group_dead) {
-                del_timer_sync(&tsk->signal->real_timer);
+                hrtimer_cancel(&tsk->signal->real_timer);
                 exit_itimers(tsk->signal);
                 acct_process(code);
         }
@@ -870,6 +871,10 @@ fastcall NORET_TYPE void do_exit(long code)
         mpol_free(tsk->mempolicy);
         tsk->mempolicy = NULL;
 #endif
+        /*
+         * If DEBUG_MUTEXES is on, make sure we are holding no locks:
+         */
+        mutex_debug_check_no_locks_held(tsk);
 
         /* PF_DEAD causes final put_task_struct after we schedule. */
         preempt_disable();
@@ -926,7 +931,6 @@ do_group_exit(int exit_code)
                         /* Another thread got here before we took the lock.  */
                         exit_code = sig->group_exit_code;
                 else {
-                        sig->flags = SIGNAL_GROUP_EXIT;
                         sig->group_exit_code = exit_code;
                         zap_other_threads(current);
                 }
@@ -1068,6 +1072,9 @@ static int wait_task_zombie(task_t *p, int noreap,
         }
 
         if (likely(p->real_parent == p->parent) && likely(p->signal)) {
+                struct signal_struct *psig;
+                struct signal_struct *sig;
+
                 /*
                  * The resource counters for the group leader are in its
                  * own task_struct.  Those for dead threads in the group
@@ -1084,24 +1091,26 @@ static int wait_task_zombie(task_t *p, int noreap,
                  * here reaping other children at the same time.
                  */
                 spin_lock_irq(&p->parent->sighand->siglock);
-                p->parent->signal->cutime =
-                        cputime_add(p->parent->signal->cutime,
+                psig = p->parent->signal;
+                sig = p->signal;
+                psig->cutime =
+                        cputime_add(psig->cutime,
                         cputime_add(p->utime,
-                        cputime_add(p->signal->utime,
-                                    p->signal->cutime)));
-                p->parent->signal->cstime =
-                        cputime_add(p->parent->signal->cstime,
+                        cputime_add(sig->utime,
+                                    sig->cutime)));
+                psig->cstime =
+                        cputime_add(psig->cstime,
                         cputime_add(p->stime,
-                        cputime_add(p->signal->stime,
-                                    p->signal->cstime)));
-                p->parent->signal->cmin_flt +=
-                        p->min_flt + p->signal->min_flt + p->signal->cmin_flt;
-                p->parent->signal->cmaj_flt +=
-                        p->maj_flt + p->signal->maj_flt + p->signal->cmaj_flt;
-                p->parent->signal->cnvcsw +=
-                        p->nvcsw + p->signal->nvcsw + p->signal->cnvcsw;
-                p->parent->signal->cnivcsw +=
-                        p->nivcsw + p->signal->nivcsw + p->signal->cnivcsw;
+                        cputime_add(sig->stime,
+                                    sig->cstime)));
+                psig->cmin_flt +=
+                        p->min_flt + sig->min_flt + sig->cmin_flt;
+                psig->cmaj_flt +=
+                        p->maj_flt + sig->maj_flt + sig->cmaj_flt;
+                psig->cnvcsw +=
+                        p->nvcsw + sig->nvcsw + sig->cnvcsw;
+                psig->cnivcsw +=
+                        p->nivcsw + sig->nivcsw + sig->cnivcsw;
                 spin_unlock_irq(&p->parent->sighand->siglock);
         }