Here, test this patch. I'm in the process of committing it now.
It will be two patches, one for the WARN_ON_SMP() change, the other for
the futex change.
-- Steve
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index c2c9ba0..25f1e9e 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -168,7 +168,7 @@ extern void warn_slowpath_null(const char *file, const int
line);
#ifdef CONFIG_SMP
# define WARN_ON_SMP(x) WARN_ON(x)
#else
-# define WARN_ON_SMP(x) do { } while (0)
+# define WARN_ON_SMP(x) ({0;})
#endif
#endif
diff --git a/kernel/futex.c b/kernel/futex.c
index 9fe9131..850d00b 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -785,8 +785,8 @@ static void __unqueue_futex(struct futex_q *q)
{
struct futex_hash_bucket *hb;
- if (WARN_ON(!q->lock_ptr || !spin_is_locked(q->lock_ptr)
- || plist_node_empty(&q->list)))
+ if (WARN_ON_SMP(!q->lock_ptr || !spin_is_locked(q->lock_ptr))
+ || WARN_ON(plist_node_empty(&q->list)))
return;
hb = container_of(q->lock_ptr, struct futex_hash_bucket, lock);
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