[SCSI] fix media change events for polled devices

[linux-2.6-omap-h63xx.git] / kernel / futex_compat.c

diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 7d5e4b016f396dc14459004a9e59e63415d8364c..ff90f049f8f6de9e5c6a01782bcb09f7df5c4bc8 100644 (file)
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -54,6 +54,9 @@ void compat_exit_robust_list(struct task_struct *curr)
        compat_long_t futex_offset;
        int rc;
 
+       if (!futex_cmpxchg_enabled)
+               return;
+
        /*
         * Fetch the list head (which was registered earlier, via
         * sys_set_robust_list()):
@@ -115,6 +118,9 @@ asmlinkage long
 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
                           compat_size_t len)
 {
+       if (!futex_cmpxchg_enabled)
+               return -ENOSYS;
+
        if (unlikely(len != sizeof(*head)))
                return -EINVAL;
 
@@ -130,6 +136,9 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
        struct compat_robust_list_head __user *head;
        unsigned long ret;
 
+       if (!futex_cmpxchg_enabled)
+               return -ENOSYS;
+
        if (!pid)
                head = current->compat_robust_list;
        else {