futex: Set FLAGS_HAS_TIMEOUT during futex_wait restart setup

The FLAGS_HAS_TIMEOUT flag was not getting set, causing the restart_block to
restart futex_wait() without a timeout after a signal.

Commit b41277d in 2.6.38 introduced the regression by accidentally
removing the the FLAGS_HAS_TIMEOUT assignment from futex_wait() during the setup
of the restart block. Restore the originaly behavior.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=32922

Reported-by: Tim Smith <[email protected]>
Reported-by: Torsten Hilbrich <[email protected]>
Signed-off-by: Darren Hart <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: John Kacur <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/%3Cdaac0eb3af607f72b9a4d3126b2ba8fb5ed3b883.1302820917.git.dvhart%40linux.intel.com%3E
Signed-off-by: Thomas Gleixner <[email protected]>

kernel/futex.c

@@ -1886,7 +1886,7 @@ static int futex_wait(u32 __user *uaddr, unsigned int flags, u32 val,
 	restart->futex.val = val;
 	restart->futex.time = abs_time->tv64;
 	restart->futex.bitset = bitset;
-	restart->futex.flags = flags;
+	restart->futex.flags = flags | FLAGS_HAS_TIMEOUT;
 
 	ret = -ERESTART_RESTARTBLOCK;