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由 David Howells 提交于
Add support for direct mapping through mtdconcat, if possible, by attaching the samebacking_dev_info structure to the master. It has some restrictions: (1) It won't permit direct mapping of concatenated devices that have differing BDIs. (2) It doesn't support maps that span the 'gap' between devices, although it possibly could if the devices spanned across return compatible (ie. contiguous) addresses from their get_unmapped_area() ops. Signed-off-by: NGavin Lambert <gavinl@compacsort.com> Signed-off-by: NDavid Howells <dhowells@redhat.com> Tested-by: NBernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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