[PATCH] futex: mark get_robust_list as deprecated

[Kees Cook]

Notify get_robust_list users that the syscall is going away.

Suggested-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
 kernel/futex.c        |    2 ++
 kernel/futex_compat.c |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 439440d..545d7a3 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -2449,6 +2449,8 @@ 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;
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index a9642d5..83e368b 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -142,6 +142,8 @@ 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;
-- 
1.7.0.4

-- 
Kees Cook
ChromeOS Security
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