percpu: factor out pcpu_check_block_hint()
Factor out the pcpu_check_block_hint() helper, which will be useful in the future. The new function checks if the allocation can likely fit within the contig hint. Signed-off-by: Roman Gushchin <guro@fb.com> Signed-off-by: Dennis Zhou <dennis@kernel.org> Signed-off-by: Dennis Zhou <dennis@kernel.org>
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67c2669d
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