drm/panel: add panel power delay for of_panel

[firefly-linux-kernel-4.4.55.git] / kernel / capability.c

diff --git a/kernel/capability.c b/kernel/capability.c
index 45432b54d5c60ca5b9cde95e480c3fae8cffae4a..00411c82dac57c4cac0254c823f9adcb2a951549 100644 (file)
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -361,6 +361,24 @@ bool has_capability_noaudit(struct task_struct *t, int cap)
        return has_ns_capability_noaudit(t, &init_user_ns, cap);
 }
 
+static bool ns_capable_common(struct user_namespace *ns, int cap, bool audit)
+{
+       int capable;
+
+       if (unlikely(!cap_valid(cap))) {
+               pr_crit("capable() called with invalid cap=%u\n", cap);
+               BUG();
+       }
+
+       capable = audit ? security_capable(current_cred(), ns, cap) :
+                         security_capable_noaudit(current_cred(), ns, cap);
+       if (capable == 0) {
+               current->flags |= PF_SUPERPRIV;
+               return true;
+       }
+       return false;
+}
+
 /**
  * ns_capable - Determine if the current task has a superior capability in effect
  * @ns:  The usernamespace we want the capability in
@@ -374,19 +392,27 @@ bool has_capability_noaudit(struct task_struct *t, int cap)
  */
 bool ns_capable(struct user_namespace *ns, int cap)
 {
-       if (unlikely(!cap_valid(cap))) {
-               pr_crit("capable() called with invalid cap=%u\n", cap);
-               BUG();
-       }
-
-       if (security_capable(current_cred(), ns, cap) == 0) {
-               current->flags |= PF_SUPERPRIV;
-               return true;
-       }
-       return false;
+       return ns_capable_common(ns, cap, true);
 }
 EXPORT_SYMBOL(ns_capable);
 
+/**
+ * ns_capable_noaudit - Determine if the current task has a superior capability
+ * (unaudited) in effect
+ * @ns:  The usernamespace we want the capability in
+ * @cap: The capability to be tested for
+ *
+ * Return true if the current task has the given superior capability currently
+ * available for use, false if not.
+ *
+ * This sets PF_SUPERPRIV on the task if the capability is available on the
+ * assumption that it's about to be used.
+ */
+bool ns_capable_noaudit(struct user_namespace *ns, int cap)
+{
+       return ns_capable_common(ns, cap, false);
+}
+EXPORT_SYMBOL(ns_capable_noaudit);
 
 /**
  * capable - Determine if the current task has a superior capability in effect