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commit267b21d0beupstream. According to DT spec, size of property 'alignment' is based on parent node’s #size-cells property. But __reserved_mem_alloc_size() wrongly uses @dt_root_addr_cells to get the property obviously. Fix by using @dt_root_size_cells instead of @dt_root_addr_cells. Fixes:3f0c820664("drivers: of: add initialization code for dynamic reserved memory") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com> Link: https://lore.kernel.org/r/20250109-of_core_fix-v4-9-db8a72415b8c@quicinc.com Signed-off-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>