futex: rely on get_user_pages() for shared futexes

[deliverable/linux.git] / include / linux / futex.h

diff --git a/include/linux/futex.h b/include/linux/futex.h
index 1a15f8e237a7cf2404b1aa5bf16ccbb4f52214b4..8f627b9ae2b15f1a6b5e383028b6adbce0034f0e 100644 (file)
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -21,6 +21,8 @@ union ktime;
 #define FUTEX_LOCK_PI          6
 #define FUTEX_UNLOCK_PI                7
 #define FUTEX_TRYLOCK_PI       8
+#define FUTEX_WAIT_BITSET      9
+#define FUTEX_WAKE_BITSET      10
 
 #define FUTEX_PRIVATE_FLAG     128
 #define FUTEX_CMD_MASK         ~FUTEX_PRIVATE_FLAG
@@ -33,6 +35,8 @@ union ktime;
 #define FUTEX_LOCK_PI_PRIVATE  (FUTEX_LOCK_PI | FUTEX_PRIVATE_FLAG)
 #define FUTEX_UNLOCK_PI_PRIVATE        (FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG)
 #define FUTEX_TRYLOCK_PI_PRIVATE (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAIT_BITSET_PRIVATE      (FUTEX_WAIT_BITS | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_BITSET_PRIVATE      (FUTEX_WAKE_BITS | FUTEX_PRIVATE_FLAG)
 
 /*
  * Support for robust futexes: the kernel cleans up held futexes at
@@ -111,6 +115,12 @@ struct robust_list_head {
  */
 #define ROBUST_LIST_LIMIT      2048
 
+/*
+ * bitset with all bits set for the FUTEX_xxx_BITSET OPs to request a
+ * match of any bit.
+ */
+#define FUTEX_BITSET_MATCH_ANY 0xffffffff
+
 #ifdef __KERNEL__
 long do_futex(u32 __user *uaddr, int op, u32 val, union ktime *timeout,
              u32 __user *uaddr2, u32 val2, u32 val3);
@@ -154,9 +164,12 @@ 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);
+extern int futex_cmpxchg_enabled;
 #else
 static inline void exit_robust_list(struct task_struct *curr)
 {