On 10/5/18 11:21 PM, Andrew Morton wrote: > On Fri, 5 Oct 2018 13:56:39 -0700 (PDT) David Rientjes <rientjes@xxxxxxxxxx> wrote: > >> If move_freepages() returns 0 because zone_spans_pfn(), *num_movable can > > move_free_pages_block()? !zone_spans_pfn()? Also the subject would be more accurate if it said "initialize num_movable in move_freepages_block()" ? Otherwise, Acked-by: Vlastimil Babka <vbabka@xxxxxxx> >> hold the value from the stack because it does not get initialized in >> move_freepages(). >> >> Move the initialization to move_freepages_block() to guarantee the value >> actually makes sense. >> >> This currently doesn't affect its only caller where num_movable != NULL, >> so no bug fix, but just more robust. >> >> ... >
