linux-kernel - [PATCH 1/3] page_alloc: make setup_nr_node

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Date:	Tue, 26 Mar 2013 10:46:00 -0700
From:	Cody P Schafer <cody@...ux.vnet.ibm.com>
To:	linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Cody P Schafer <cody@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Mackerras <paulus@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH 1/3] page_alloc: make setup_nr_node_ids() usable for arch init code

powerpc and x86 were opencoding copies of setup_nr_node_ids(), which
page_alloc provides but makes static. Make it avaliable to the archs in
linux/mm.h.

Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com>
---
 include/linux/mm.h | 6 ++++++
 mm/page_alloc.c    | 6 +-----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7acc9dc..3405405 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1755,5 +1755,11 @@ static inline unsigned int debug_guardpage_minorder(void) { return 0; }
 static inline bool page_is_guard(struct page *page) { return false; }
 #endif /* CONFIG_DEBUG_PAGEALLOC */
 
+#if MAX_NUMNODES > 1
+void __init setup_nr_node_ids(void);
+#else
+static inline void setup_nr_node_ids(void) {}
+#endif
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8fcced7..96909bb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4710,7 +4710,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
 /*
  * Figure out the number of possible node ids.
  */
-static void __init setup_nr_node_ids(void)
+void __init setup_nr_node_ids(void)
 {
 	unsigned int node;
 	unsigned int highest = 0;
@@ -4719,10 +4719,6 @@ static void __init setup_nr_node_ids(void)
 		highest = node;
 	nr_node_ids = highest + 1;
 }
-#else
-static inline void setup_nr_node_ids(void)
-{
-}
 #endif
 
 /**
-- 
1.8.2

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