linux-kernel - [PATCH 2/2] mm: memory_hotplug: cleanup after removal of pfn_valid

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Date:   Tue, 13 Jul 2021 11:00:35 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mike Rapoport <rppt@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 2/2] mm: memory_hotplug: cleanup after removal of pfn_valid_within()

From: Mike Rapoport <rppt@...ux.ibm.com>

When test_pages_in_a_zone() used pfn_valid_within() is has some logic
surrounding pfn_valid_within() checks.

Since pfn_valid_within() is gone, this logic can be removed.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
---
 mm/memory_hotplug.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 1085bd03ecba..ca09045bb587 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1298,7 +1298,7 @@ struct zone *test_pages_in_a_zone(unsigned long start_pfn,
 	unsigned long pfn, sec_end_pfn;
 	struct zone *zone = NULL;
 	struct page *page;
-	int i;
+
 	for (pfn = start_pfn, sec_end_pfn = SECTION_ALIGN_UP(start_pfn + 1);
 	     pfn < end_pfn;
 	     pfn = sec_end_pfn, sec_end_pfn += PAGES_PER_SECTION) {
@@ -1307,13 +1307,10 @@ struct zone *test_pages_in_a_zone(unsigned long start_pfn,
 			continue;
 		for (; pfn < sec_end_pfn && pfn < end_pfn;
 		     pfn += MAX_ORDER_NR_PAGES) {
-			i = 0;
-			if (i == MAX_ORDER_NR_PAGES || pfn + i >= end_pfn)
-				continue;
 			/* Check if we got outside of the zone */
-			if (zone && !zone_spans_pfn(zone, pfn + i))
+			if (zone && !zone_spans_pfn(zone, pfn))
 				return NULL;
-			page = pfn_to_page(pfn + i);
+			page = pfn_to_page(pfn);
 			if (zone && page_zone(page) != zone)
 				return NULL;
 			zone = page_zone(page);
-- 
2.28.0