From da6fb7a9e5bd6f04f7e15070f630bdf1ea502841 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.com>
Date: Thu, 1 Oct 2015 16:03:38 +1000
Subject: [PATCH] md/bitmap: don't pass -1 to bitmap_storage_alloc.

Passing -1 to bitmap_storage_alloc() causes page->index to be set to
-1, which is quite problematic.

So only pass ->cluster_slot if mddev_is_clustered().

Fixes: b97e92574c0b ("Use separate bitmaps for each nodes in the cluster")
Cc: stable@vger.kernel.org (v4.1+)
Signed-off-by: NeilBrown <neilb@suse.com>
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