mm/hugetlb: count file_region to be added when regions_needed != NULL
There are only two cases of function add_reservation_in_range() * count file_region and return the number in regions_needed * do the real list operation without counting This means it is not necessary to have two parameters to classify these two cases. Just use regions_needed to separate them. Signed-off-by: NWei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Reviewed-by: NBaoquan He <bhe@redhat.com> Reviewed-by: NMike Kravetz <mike.kravetz@oracle.com> Cc: Vlastimil Babka <vbabka@suse.cz> Link: https://lkml.kernel.org/r/20200831022351.20916-5-richard.weiyang@linux.alibaba.comSigned-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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