[PATCH v2 01/16] mm/page_alloc: Cache page_zone() result in free_unref_page()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Save 17 bytes of text by calculating page_zone() once instead of twice.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/page_alloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e5486d47406e..2745865a57c5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3483,16 +3483,16 @@ void free_unref_page(struct page *page, unsigned int order)
 	 * areas back if necessary. Otherwise, we may have to free
 	 * excessively into the page allocator
 	 */
+	zone = page_zone(page);
 	migratetype = get_pcppage_migratetype(page);
 	if (unlikely(migratetype >= MIGRATE_PCPTYPES)) {
 		if (unlikely(is_migrate_isolate(migratetype))) {
-			free_one_page(page_zone(page), page, pfn, order, migratetype, FPI_NONE);
+			free_one_page(zone, page, pfn, order, migratetype, FPI_NONE);
 			return;
 		}
 		migratetype = MIGRATE_MOVABLE;
 	}
 
-	zone = page_zone(page);
 	pcp_trylock_prepare(UP_flags);
 	pcp = pcp_spin_trylock_irqsave(zone->per_cpu_pageset, flags);
 	if (pcp) {
-- 
2.35.1