linux-kernel - [PATCH] mm, meminit: Recalculate pcpu batch and high limits after init completes -fix

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Message-ID: <20191021193951.GB3016@techsingularity.net>
Date:   Mon, 21 Oct 2019 20:39:51 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Michal Hocko <mhocko@...e.com>, Vlastimil Babka <vbabka@...e.cz>,
        Thomas Gleixner <tglx@...utronix.de>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Borislav Petkov <bp@...en8.de>, Linux-MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        lkp@...el.com
Subject: [PATCH] mm, meminit: Recalculate pcpu batch and high limits after
 init completes -fix

LKP reported the following build problem from two hunks that did not
survive the reshuffling of the series reordering.

 ld: mm/page_alloc.o: in function `page_alloc_init_late':
 mm/page_alloc.c:1956: undefined reference to `zone_pcp_update'

Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
---
 mm/page_alloc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4179376bb336..e9926bf77463 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8524,7 +8524,6 @@ void free_contig_range(unsigned long pfn, unsigned int nr_pages)
 	WARN(count != 0, "%d pages are still in use!\n", count);
 }
 
-#ifdef CONFIG_MEMORY_HOTPLUG
 /*
  * The zone indicated has a new number of managed_pages; batch sizes and percpu
  * page high values need to be recalulated.
@@ -8535,7 +8534,6 @@ void __meminit zone_pcp_update(struct zone *zone)
 	__zone_pcp_update(zone);
 	mutex_unlock(&pcp_batch_high_lock);
 }
-#endif
 
 void zone_pcp_reset(struct zone *zone)
 {