linux-kernel - [DEBUG 17/21] mm: Export definition of 'zone

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Message-Id: <20170130033602.12275-18-khandual@linux.vnet.ibm.com>
Date:   Mon, 30 Jan 2017 09:05:58 +0530
From:   Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     mhocko@...e.com, vbabka@...e.cz, mgorman@...e.de,
        minchan@...nel.org, aneesh.kumar@...ux.vnet.ibm.com,
        bsingharora@...il.com, srikar@...ux.vnet.ibm.com,
        haren@...ux.vnet.ibm.com, jglisse@...hat.com,
        dave.hansen@...el.com, dan.j.williams@...el.com
Subject: [DEBUG 17/21] mm: Export definition of 'zone_names' array through mmzone.h

zone_names[] is used to identify any zone given it's index which
can be used in many other places. So exporting the definition
through include/linux/mmzone.h header for it's broader access.

Signed-off-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
---
 include/linux/mmzone.h | 1 +
 mm/page_alloc.c        | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index f4aac87..fd1ab32 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -341,6 +341,7 @@ enum zone_type {
 
 };
 
+extern char * const zone_names[];
 #ifndef __GENERATING_BOUNDS_H
 
 struct zone {
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 609cf9c..80fba54 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -212,7 +212,7 @@ int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = {
 
 EXPORT_SYMBOL(totalram_pages);
 
-static char * const zone_names[MAX_NR_ZONES] = {
+char * const zone_names[MAX_NR_ZONES] = {
 #ifdef CONFIG_ZONE_DMA
 	 "DMA",
 #endif
-- 
2.9.3