futex: rely on get_user_pages() for shared futexes

[firefly-linux-kernel-4.4.55.git] / include / linux / futex.h

diff --git a/include/linux/futex.h b/include/linux/futex.h
index 586ab56a3ec3500e601e786e0e858f1980fbc8e5..8f627b9ae2b15f1a6b5e383028b6adbce0034f0e 100644 (file)
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -164,6 +164,8 @@ union futex_key {
        } both;
 };
 
+#define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = NULL } }
+
 #ifdef CONFIG_FUTEX
 extern void exit_robust_list(struct task_struct *curr);
 extern void exit_pi_state_list(struct task_struct *curr);