memory-hotplug: don't BUG() in register_memory_resource()
Out of memory condition is not a bug and while we can't add new memory in such case crashing the system seems wrong. Propagating the return value from register_memory_resource() requires interface change. Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: NIgor Mammedov <imammedo@redhat.com> Acked-by: NDavid Rientjes <rientjes@google.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: Sheng Yong <shengyong1@huawei.com> Cc: Zhu Guihua <zhugh.fnst@cn.fujitsu.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Vrabel <david.vrabel@citrix.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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