linux-kernel - [PATCH v2 2/3] mm: add pageblock

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Message-ID: <20220907060844.126891-2-wangkefeng.wang@huawei.com>
Date:   Wed, 7 Sep 2022 14:08:43 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>, <linux-mm@...ck.org>
CC:     Mike Rapoport <rppt@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        <linux-kernel@...r.kernel.org>, "Vlastimil Babka" <vbabka@...e.cz>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v2 2/3] mm: add pageblock_align() macro

Add pageblock_align() macro and use it to simplify code.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 include/linux/pageblock-flags.h | 1 +
 mm/memblock.c                   | 4 ++--
 mm/page_isolation.c             | 4 ++--
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index a09b7fe6bbf8..293c76630fa8 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -53,6 +53,7 @@ extern unsigned int pageblock_order;
 #endif /* CONFIG_HUGETLB_PAGE */
 
 #define pageblock_nr_pages	(1UL << pageblock_order)
+#define pageblock_align(pfn)	ALIGN((pfn), pageblock_nr_pages)
 #define pageblock_start_pfn(pfn)	ALIGN_DOWN((pfn), pageblock_nr_pages)
 #define pageblock_end_pfn(pfn)		ALIGN((pfn) + 1, pageblock_nr_pages)
 
diff --git a/mm/memblock.c b/mm/memblock.c
index 46fe7575f03c..511d4783dcf1 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -2014,12 +2014,12 @@ static void __init free_unused_memmap(void)
 		 * presume that there are no holes in the memory map inside
 		 * a pageblock
 		 */
-		prev_end = ALIGN(end, pageblock_nr_pages);
+		prev_end = pageblock_align(end);
 	}
 
 #ifdef CONFIG_SPARSEMEM
 	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION)) {
-		prev_end = ALIGN(end, pageblock_nr_pages);
+		prev_end = pageblock_align(end);
 		free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION));
 	}
 #endif
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 9c75170980ab..abd74bd24a35 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -532,7 +532,7 @@ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
 	struct page *page;
 	/* isolation is done at page block granularity */
 	unsigned long isolate_start = pageblock_start_pfn(start_pfn);
-	unsigned long isolate_end = ALIGN(end_pfn, pageblock_nr_pages);
+	unsigned long isolate_end = pageblock_align(end_pfn);
 	int ret;
 	bool skip_isolation = false;
 
@@ -577,7 +577,7 @@ void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
 	unsigned long pfn;
 	struct page *page;
 	unsigned long isolate_start = pageblock_start_pfn(start_pfn);
-	unsigned long isolate_end = ALIGN(end_pfn, pageblock_nr_pages);
+	unsigned long isolate_end = pageblock_align(end_pfn);
 
 	for (pfn = isolate_start;
 	     pfn < isolate_end;
-- 
2.35.3