futex: Revert "futex: Mark get_robust_list as deprecated"

This reverts commit ec0c427.

get_robust_list() is in use and a removal would break existing user
space. With the permission checks in place it's not longer a security
hole. Remove the deprecation warnings.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

Author: KAGA-KOKO

kernel/futex.c

@@ -2471,8 +2471,6 @@ SYSCALL_DEFINE3(get_robust_list, int, pid,
 	if (!futex_cmpxchg_enabled)
 		return -ENOSYS;
 
-	WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
-
 	rcu_read_lock();
 
 	ret = -ESRCH;

kernel/futex_compat.c

@@ -142,8 +142,6 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 	if (!futex_cmpxchg_enabled)
 		return -ENOSYS;
 
-	WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
-
 	rcu_read_lock();
 
 	ret = -ESRCH;