linux-kernel - [PATCH V2 1/2] mm: Export definition of 'zone

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Message-Id: <1473140072-24137-1-git-send-email-khandual@linux.vnet.ibm.com>
Date:   Tue,  6 Sep 2016 11:04:31 +0530
From:   Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     akpm@...ux-foundation.org
Subject: [PATCH V2 1/2] 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>
---
Changes in V2:
- Removed the static and declared in mmzone.h per Andrew

 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 7f2ae99..9943204 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 a2214c6..cb46bf8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -207,7 +207,7 @@ 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
-- 
2.1.0