memremap: provide stubs for vmem_altmap_offset and vmem_altmap_free
Currently all calls to those functions are eliminated by the compiler when CONFIG_ZONE_DEVICE is not set, but this soon won't be the case. Signed-off-by:Christoph Hellwig <hch@lst.de> Signed-off-by:
Dan Williams <dan.j.williams@intel.com>
parent
30a7acd5
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