Merge commit 'v2.6.30-rc5' into core/iommu

Merge reason: core/iommu was on an .30-rc1 base,
              update it to .30-rc5 to refresh.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 1 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index 6b50a024bca2..eef8cd26b5e5 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -883,7 +883,12 @@ retry_private:
 out_unlock:
         double_unlock_hb(hb1, hb2);
 
-        /* drop_futex_key_refs() must be called outside the spinlocks. */
+        /*
+         * drop_futex_key_refs() must be called outside the spinlocks. During
+         * the requeue we moved futex_q's from the hash bucket at key1 to the
+         * one at key2 and updated their key pointer.  We no longer need to
+         * hold the references to key1.
+         */
         while (--drop_count >= 0)
                 drop_futex_key_refs(&key1);