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Michael Ellerman authored
Follow the example of the cpu feature code, and add a mask of possible MMU features, MMU_FTRS_POSSIBLE. This is used in mmu_has_feature(), which allows the possible mask to act as a shortcut for any features that are not possible, but still allows the feature bit itself to be defined. We will use this in the next commit to allow MMU_FTR_RADIX checks to be elided when MMU_FTR_RADIX is not possible. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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