mm/page_alloc: use local variable zone_idx directly

Use local variable zone_idx directly since it holds the exact value of
zone_idx().  No functional change intended.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Miaohe Lin <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions