On Tue, 23 Oct 2012, Michal Hocko wrote:

From e8d79e446b00e57c195c59570df0f2ec435ca39d Mon Sep 17 00:00:00 2001
From: Michal Hocko <redacted>
Date: Tue, 23 Oct 2012 11:07:11 +0200
Subject: [PATCH] mm: make zone_pcp_reset independ on MEMORY_HOTREMOVE

340175b7 (mm/hotplug: free zone->pageset when a zone becomes empty)
introduced zone_pcp_reset and hided it inside CONFIG_MEMORY_HOTREMOVE.
Since "memory-hotplug: allocate zone's pcp before onlining pages" the
function is also called from online_pages which is defined outside
CONFIG_MEMORY_HOTREMOVE which causes a linkage error.

The function, although not used outside of MEMORY_{HOTPLUT,HOTREMOVE},
seems like universal enough so let's keep it at its current location
and only remove the HOTREMOVE guard.

Signed-off-by: Michal Hocko <redacted>
Reviewed-by: Wen Congyang <redacted>
Cc: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <redacted>
Cc: Len Brown <redacted>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <redacted>
Cc: Christoph Lameter <redacted>
Cc: Minchan Kim <redacted>
Cc: KOSAKI Motohiro <redacted>
Cc: Yasuaki Ishimatsu <redacted>
Cc: Dave Hansen <redacted>
Cc: Mel Gorman <redacted>

Acked-by: David Rientjes <rientjes@google.com>

This fixes the build error on linux-next of this morning, thanks.

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