mm/sparse: only sub-section aligned range would be populated
There are two code path which invoke __populate_section_memmap() * sparse_init_nid() * sparse_add_section() For both case, we are sure the memory range is sub-section aligned. * we pass PAGES_PER_SECTION to sparse_init_nid() * we check range by check_pfn_span() before calling sparse_add_section() Also, the counterpart of __populate_section_memmap(), we don't do such calculation and check since the range is checked by check_pfn_span() in __remove_pages(). Clear the calculation and check to keep it simple and comply with its counterpart. Signed-off-by: NWei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Acked-by: NDavid Hildenbrand <david@redhat.com> Link: http://lkml.kernel.org/r/20200703031828.14645-1-richard.weiyang@linux.alibaba.comSigned-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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