linux-kernel - [RFC PATCH v2, part4 39/39] mm: kill global variable num

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Date:	Sun, 24 Mar 2013 15:25:34 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Michel Lespinasse <walken@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Subject: [RFC PATCH v2, part4 39/39] mm: kill global variable num_physpages

Now all references to num_physpages have been removed, so kill it.

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Michel Lespinasse <walken@...gle.com>
Cc: Rik van Riel <riel@...hat.com>
Cc: Jiang Liu <jiang.liu@...wei.com>
Cc: Hugh Dickins <hughd@...gle.com>
Cc: David Rientjes <rientjes@...gle.com>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
---
 include/linux/mm.h |    1 -
 mm/memory.c        |    2 --
 mm/nommu.c         |    2 --
 3 files changed, 5 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c225a4f..a49afbf 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -29,7 +29,6 @@ struct writeback_control;
 extern unsigned long max_mapnr;
 #endif
 
-extern unsigned long num_physpages;
 extern unsigned long totalram_pages;
 extern void * high_memory;
 extern int page_cluster;
diff --git a/mm/memory.c b/mm/memory.c
index 705473a..ecc771d 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -82,7 +82,6 @@ EXPORT_SYMBOL(max_mapnr);
 EXPORT_SYMBOL(mem_map);
 #endif
 
-unsigned long num_physpages;
 /*
  * A number of key systems in x86 including ioremap() rely on the assumption
  * that high_memory defines the upper bound on direct map memory, then end
@@ -92,7 +91,6 @@ unsigned long num_physpages;
  */
 void * high_memory;
 
-EXPORT_SYMBOL(num_physpages);
 EXPORT_SYMBOL(high_memory);
 
 /*
diff --git a/mm/nommu.c b/mm/nommu.c
index 4eb25a8..ac23388 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -55,7 +55,6 @@
 void *high_memory;
 struct page *mem_map;
 unsigned long max_mapnr;
-unsigned long num_physpages;
 unsigned long highest_memmap_pfn;
 struct percpu_counter vm_committed_as;
 int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */
@@ -82,7 +81,6 @@ unsigned long vm_memory_committed(void)
 EXPORT_SYMBOL_GPL(vm_memory_committed);
 
 EXPORT_SYMBOL(mem_map);
-EXPORT_SYMBOL(num_physpages);
 
 /* list of mapped, potentially shareable regions */
 static struct kmem_cache *vm_region_jar;
-- 
1.7.9.5

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