kernel/exit.c: Use list_for_each_entry(_safe) instead of list_for_each(_safe)

kernel/exit.c: Convert list_for_each(_safe) to
list_for_each_entry(_safe) in forget_original_parent(), exit_notify()
and do_wait()

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 13 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index db9764186d5a..c5d97af12159 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -669,8 +669,7 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 static void
 forget_original_parent(struct task_struct *father, struct list_head *to_release)
 {
-        struct task_struct *p, *reaper = father;
-        struct list_head *_p, *_n;
+        struct task_struct *p, *n, *reaper = father;
 
         do {
                 reaper = next_thread(reaper);
@@ -688,9 +687,8 @@ forget_original_parent(struct task_struct *father, struct list_head *to_release)
          *
          * Search them and reparent children.
          */
-        list_for_each_safe(_p, _n, &father->children) {
+        list_for_each_entry_safe(p, n, &father->children, sibling) {
                 int ptrace;
-                p = list_entry(_p, struct task_struct, sibling);
 
                 ptrace = p->ptrace;
 
@@ -718,8 +716,7 @@ forget_original_parent(struct task_struct *father, struct list_head *to_release)
                 if (unlikely(ptrace && p->exit_state == EXIT_ZOMBIE && p->exit_signal == -1))
                         list_add(&p->ptrace_list, to_release);
         }
-        list_for_each_safe(_p, _n, &father->ptrace_children) {
-                p = list_entry(_p, struct task_struct, ptrace_list);
+        list_for_each_entry_safe(p, n, &father->ptrace_children, ptrace_list) {
                 p->real_parent = reaper;
                 reparent_thread(p, father, 1);
         }
@@ -1518,12 +1515,9 @@ repeat:
         tsk = current;
         do {
                 struct task_struct *p;
-                struct list_head *_p;
                 int ret;
 
-                list_for_each(_p,&tsk->children) {
-                        p = list_entry(_p, struct task_struct, sibling);
-
+                list_for_each_entry(p, &tsk->children, sibling) {
                         ret = eligible_child(pid, options, p);
                         if (!ret)
                                 continue;
@@ -1605,9 +1599,8 @@ check_continued:
                         }
                 }
                 if (!flag) {
-                        list_for_each(_p, &tsk->ptrace_children) {
-                                p = list_entry(_p, struct task_struct,
-                                                ptrace_list);
+                        list_for_each_entry(p, &tsk->ptrace_children,
+                                            ptrace_list) {
                                 if (!eligible_child(pid, options, p))
                                         continue;
                                 flag = 1;