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Following is an example error message when using > MapleTree in nova-core's Vmm. > > This propagates up through MapleTreeAlloc to Vmm, BarUser, Gpu, and NovaC= ore, > causing NovaCore to fail the Send bound required by pci::Driver: This patch is not at the right place - the last few patches of the series won't build without it. Besides you have sent it separately before this series, so just mention it as a dependency in the cover letter, so reviewers can pick it up before applying the series and not witness it breaking in the course of reviewing it. The cover letter already mentions the bitfield series as a dependency, so the same could have been done for this one.