arm: extend pfn_valid to take into account freed memory map alignment
When unused memory map is freed the preserved part of the memory map is extended to match pageblock boundaries because lots of core mm functionality relies on homogeneity of the memory map within pageblock boundaries. Since pfn_valid() is used to check whether there is a valid memory map entry for a PFN, make it return true also for PFNs that have memory map entries even if there is no actual memory populated there. Signed-off-by:Mike Rapoport <rppt@linux.ibm.com> Tested-by:
Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by:
Tony Lindgren <tony@atomide.com>
parent
023accf5