cgroups: add cpu_relax() calls in css_tryget() and cgroup_clear_css_refs()

[safe/jmp/linux-2.6] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 1d68f12..242a706 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -817,17 +817,17 @@ static void posix_cpu_timers_init_group(struct signal_struct *sig)
 static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
 {
        struct signal_struct *sig;
-       int ret;
 
        if (clone_flags & CLONE_THREAD) {
-               ret = thread_group_cputime_clone_thread(current);
-               if (likely(!ret)) {
-                       atomic_inc(&current->signal->count);
-                       atomic_inc(&current->signal->live);
-               }
-               return ret;
+               atomic_inc(&current->signal->count);
+               atomic_inc(&current->signal->live);
+               return 0;
        }
        sig = kmem_cache_alloc(signal_cachep, GFP_KERNEL);
+
+       if (sig)
+               posix_cpu_timers_init_group(sig);
+
        tsk->signal = sig;
        if (!sig)
                return -ENOMEM;
@@ -864,8 +864,6 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
        memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
        task_unlock(current->group_leader);
 
-       posix_cpu_timers_init_group(sig);
-
        acct_init_pacct(&sig->pacct);
 
        tty_audit_fork(sig);
@@ -901,7 +899,7 @@ static void copy_flags(unsigned long clone_flags, struct task_struct *p)
        clear_freeze_flag(p);
 }
 
-asmlinkage long sys_set_tid_address(int __user *tidptr)
+SYSCALL_DEFINE1(set_tid_address, int __user *, tidptr)
 {
        current->clear_child_tid = tidptr;
 
@@ -1603,7 +1601,7 @@ static int unshare_fd(unsigned long unshare_flags, struct files_struct **new_fdp
  * constructed. Here we are modifying the current, active,
  * task_struct.
  */
-asmlinkage long sys_unshare(unsigned long unshare_flags)
+SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 {
        int err = 0;
        struct fs_struct *fs, *new_fs = NULL;