1 files changed, 31 insertions, 5 deletions

diff --git a/include/linux/futex.h b/include/linux/futex.h
index 65d6cfdb6d39..10f96c31971e 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -4,14 +4,40 @@
 /* Second argument to futex syscall */
 
 
-#define FUTEX_WAIT (0)
-#define FUTEX_WAKE (1)
-#define FUTEX_FD (2)
-#define FUTEX_REQUEUE (3)
-#define FUTEX_CMP_REQUEUE (4)
+#define FUTEX_WAIT              0
+#define FUTEX_WAKE              1
+#define FUTEX_FD                2
+#define FUTEX_REQUEUE           3
+#define FUTEX_CMP_REQUEUE       4
+#define FUTEX_WAKE_OP           5
 
 long do_futex(unsigned long uaddr, int op, int val,
                 unsigned long timeout, unsigned long uaddr2, int val2,
                 int val3);
 
+#define FUTEX_OP_SET            0       /* *(int *)UADDR2 = OPARG; */
+#define FUTEX_OP_ADD            1       /* *(int *)UADDR2 += OPARG; */
+#define FUTEX_OP_OR             2       /* *(int *)UADDR2 |= OPARG; */
+#define FUTEX_OP_ANDN           3       /* *(int *)UADDR2 &= ~OPARG; */
+#define FUTEX_OP_XOR            4       /* *(int *)UADDR2 ^= OPARG; */
+
+#define FUTEX_OP_OPARG_SHIFT    8       /* Use (1 << OPARG) instead of OPARG.  */
+
+#define FUTEX_OP_CMP_EQ         0       /* if (oldval == CMPARG) wake */
+#define FUTEX_OP_CMP_NE         1       /* if (oldval != CMPARG) wake */
+#define FUTEX_OP_CMP_LT         2       /* if (oldval < CMPARG) wake */
+#define FUTEX_OP_CMP_LE         3       /* if (oldval <= CMPARG) wake */
+#define FUTEX_OP_CMP_GT         4       /* if (oldval > CMPARG) wake */
+#define FUTEX_OP_CMP_GE         5       /* if (oldval >= CMPARG) wake */
+
+/* FUTEX_WAKE_OP will perform atomically
+   int oldval = *(int *)UADDR2;
+   *(int *)UADDR2 = oldval OP OPARG;
+   if (oldval CMP CMPARG)
+     wake UADDR2;  */
+
+#define FUTEX_OP(op, oparg, cmp, cmparg) \
+  (((op & 0xf) << 28) | ((cmp & 0xf) << 24)             \
+   | ((oparg & 0xfff) << 12) | (cmparg & 0xfff))
+
 #endif