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[ Upstream commit3a0b171302] Added helpers to acquire and release the umem dmabuf revoke lock. The intent is to avoid the need for drivers to peek into the ib_umem_dmabuf internals to get the dma_resv_lock and bring us one step closer to abstracting ib_umem_dmabuf away from drivers in general. Signed-off-by: Jacob Moroni <jmoroni@google.com> Link: https://patch.msgid.link/20260305170826.3803155-5-jmoroni@google.com Signed-off-by: Leon Romanovsky <leon@kernel.org> Stable-dep-of:a846aecb93("RDMA/irdma: Prevent rereg_mr for non-mem regions") Signed-off-by: Sasha Levin <sashal@kernel.org>