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This patch introduces a compat_id pointer member and sysfs interface for each fpga region, similar as compat_id for fpga manager, it allows applications to read the per region compat_id for compatibility checking before other actions on this fpga-region (e.g. PR). Signed-off-by: Wu Hao <[email protected]> Acked-by: Alan Tull <[email protected]> Acked-by: Moritz Fischer <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>