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mm/slub: simplify the last resort slab order calculation
If calculate_order() can't fit even a single large object within slub_max_order, it will try using the smallest necessary order that may exceed slub_max_order but not MAX_ORDER. Currently this is done with a call to calc_slab_order() which is unnecessary. We can simply use get_order(size). No functional change. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Feng Tang <feng.tang@intel.com> Reviewed-and-tested-by: Jay Patel <jaypatel@linux.ibm.com>
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