linux-kernel - [PATCH v2 03/16] mm: remove obsolete macro NR_PCP_ORDER_MASK and NR_PCP_ORDER

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Message-ID: <20220916072257.9639-4-linmiaohe@huawei.com>
Date:   Fri, 16 Sep 2022 15:22:44 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <david@...hat.com>,
        <osalvador@...e.de>, <anshuman.khandual@....com>
CC:     <willy@...radead.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH v2 03/16] mm: remove obsolete macro NR_PCP_ORDER_MASK and NR_PCP_ORDER_WIDTH

Since commit 8b10b465d0e1 ("mm/page_alloc: free pages in a single pass
during bulk free"), they're not used anymore. Remove them.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
Reviewed-by: Oscar Salvador <osalvador@...e.de>
---
 include/linux/mmzone.h | 7 -------
 mm/page_alloc.c        | 1 -
 2 files changed, 8 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index d907a29cc429..93f9aa346724 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -564,13 +564,6 @@ enum zone_watermarks {
 #define NR_LOWORDER_PCP_LISTS (MIGRATE_PCPTYPES * (PAGE_ALLOC_COSTLY_ORDER + 1))
 #define NR_PCP_LISTS (NR_LOWORDER_PCP_LISTS + NR_PCP_THP)
 
-/*
- * Shift to encode migratetype and order in the same integer, with order
- * in the least significant bits.
- */
-#define NR_PCP_ORDER_WIDTH 8
-#define NR_PCP_ORDER_MASK ((1<<NR_PCP_ORDER_WIDTH) - 1)
-
 #define min_wmark_pages(z) (z->_watermark[WMARK_MIN] + z->watermark_boost)
 #define low_wmark_pages(z) (z->_watermark[WMARK_LOW] + z->watermark_boost)
 #define high_wmark_pages(z) (z->_watermark[WMARK_HIGH] + z->watermark_boost)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 04559870ed12..bb2906829599 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1584,7 +1584,6 @@ static void free_pcppages_bulk(struct zone *zone, int count,
 
 		order = pindex_to_order(pindex);
 		nr_pages = 1 << order;
-		BUILD_BUG_ON(MAX_ORDER >= (1<<NR_PCP_ORDER_WIDTH));
 		do {
 			int mt;
 
-- 
2.23.0