X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=include%2Flinux%2Ffutex.h;h=586ab56a3ec3500e601e786e0e858f1980fbc8e5;hb=f221e726bf4e082a05dcd573379ac859bfba7126;hp=820125c628c1364478cfcc513275214aa9da628a;hpb=9adef58b1d4fbb58d7daed931b6790c5a3b7543a;p=cascardo%2Flinux.git

diff --git a/include/linux/futex.h b/include/linux/futex.h
index 820125c628c1..586ab56a3ec3 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -1,7 +1,13 @@
 #ifndef _LINUX_FUTEX_H
 #define _LINUX_FUTEX_H
 
-#include <linux/sched.h>
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+struct inode;
+struct mm_struct;
+struct task_struct;
+union ktime;
 
 /* Second argument to futex syscall */
 
@@ -15,6 +21,22 @@
 #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
+
+#define FUTEX_WAIT_PRIVATE	(FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_PRIVATE	(FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_REQUEUE_PRIVATE	(FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_CMP_REQUEUE_PRIVATE (FUTEX_CMP_REQUEUE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_OP_PRIVATE	(FUTEX_WAKE_OP | FUTEX_PRIVATE_FLAG)
+#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
@@ -93,8 +115,14 @@ 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, unsigned long timeout,
+long do_futex(u32 __user *uaddr, int op, u32 val, union ktime *timeout,
 	      u32 __user *uaddr2, u32 val2, u32 val3);
 
 extern int
@@ -106,8 +134,18 @@ handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi);
  * Don't rearrange members without looking at hash_futex().
  *
  * offset is aligned to a multiple of sizeof(u32) (== 4) by definition.
- * We set bit 0 to indicate if it's an inode-based key.
- */
+ * We use the two low order bits of offset to tell what is the kind of key :
+ *  00 : Private process futex (PTHREAD_PROCESS_PRIVATE)
+ *       (no reference on an inode or mm)
+ *  01 : Shared futex (PTHREAD_PROCESS_SHARED)
+ *	mapped on a file (reference on the underlying inode)
+ *  10 : Shared futex (PTHREAD_PROCESS_SHARED)
+ *       (but private mapping on an mm, and reference taken on it)
+*/
+
+#define FUT_OFF_INODE    1 /* We set bit 0 if key has a reference on inode */
+#define FUT_OFF_MMSHARED 2 /* We set bit 1 if key has a reference on mm */
+
 union futex_key {
 	struct {
 		unsigned long pgoff;
@@ -125,13 +163,11 @@ union futex_key {
 		int offset;
 	} both;
 };
-int get_futex_key(u32 __user *uaddr, union futex_key *key);
-void get_futex_key_refs(union futex_key *key);
-void drop_futex_key_refs(union futex_key *key);
 
 #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)
 {