PM: Wait for console in resume

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

diff --git a/kernel/futex.c b/kernel/futex.c
index 206d4c9..f89d373 100644 (file)
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -409,13 +409,20 @@ static void free_pi_state(struct futex_pi_state *pi_state)
 static struct task_struct * futex_find_get_task(pid_t pid)
 {
        struct task_struct *p;
+       const struct cred *cred = current_cred(), *pcred;
 
        rcu_read_lock();
        p = find_task_by_vpid(pid);
-       if (!p || ((current->euid != p->euid) && (current->euid != p->uid)))
+       if (!p) {
                p = ERR_PTR(-ESRCH);
-       else
-               get_task_struct(p);
+       } else {
+               pcred = __task_cred(p);
+               if (cred->euid != pcred->euid &&
+                   cred->euid != pcred->uid)
+                       p = ERR_PTR(-ESRCH);
+               else
+                       get_task_struct(p);
+       }
 
        rcu_read_unlock();
 
@@ -1726,9 +1733,8 @@ pi_faulted:
  * @head: pointer to the list-head
  * @len: length of the list-head, as userspace expects
  */
-asmlinkage long
-sys_set_robust_list(struct robust_list_head __user *head,
-                   size_t len)
+SYSCALL_DEFINE2(set_robust_list, struct robust_list_head __user *, head,
+               size_t, len)
 {
        if (!futex_cmpxchg_enabled)
                return -ENOSYS;
@@ -1749,12 +1755,13 @@ sys_set_robust_list(struct robust_list_head __user *head,
  * @head_ptr: pointer to a list-head pointer, the kernel fills it in
  * @len_ptr: pointer to a length field, the kernel fills in the header size
  */
-asmlinkage long
-sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
-                   size_t __user *len_ptr)
+SYSCALL_DEFINE3(get_robust_list, int, pid,
+               struct robust_list_head __user * __user *, head_ptr,
+               size_t __user *, len_ptr)
 {
        struct robust_list_head __user *head;
        unsigned long ret;
+       const struct cred *cred = current_cred(), *pcred;
 
        if (!futex_cmpxchg_enabled)
                return -ENOSYS;
@@ -1770,8 +1777,10 @@ sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
                if (!p)
                        goto err_unlock;
                ret = -EPERM;
-               if ((current->euid != p->euid) && (current->euid != p->uid) &&
-                               !capable(CAP_SYS_PTRACE))
+               pcred = __task_cred(p);
+               if (cred->euid != pcred->euid &&
+                   cred->euid != pcred->uid &&
+                   !capable(CAP_SYS_PTRACE))
                        goto err_unlock;
                head = p->robust_list;
                rcu_read_unlock();
@@ -1968,9 +1977,9 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
 }
 
 
-asmlinkage long sys_futex(u32 __user *uaddr, int op, u32 val,
-                         struct timespec __user *utime, u32 __user *uaddr2,
-                         u32 val3)
+SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val,
+               struct timespec __user *, utime, u32 __user *, uaddr2,
+               u32, val3)
 {
        struct timespec ts;
        ktime_t t, *tp = NULL;