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Date: Thu, 12 Feb 2009 16:22:03 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
davem@...emlloft.net, heiko.carstens@...ibm.com
Subject: [PATCH 1/2] clean up for early_pfn_to_nid
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Declaration of early_pfn_to_nid() is scattered over per-arch include files,
and it seems it's complicated to know when the declaration is used.
I think it makes fix-for-memmap-init not easy.
This patch moves all declaration to include/linux/mm.h
After this,
if !CONFIG_NODES_POPULATES_NODE_MAP && !CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
-> Use static definition in include/linux/mm.h
else if !CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
-> Use generic definition in mm/page_alloc.c
else
-> per-arch back end function will be called.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
---
arch/ia64/include/asm/mmzone.h | 4 ----
arch/ia64/mm/numa.c | 2 +-
arch/x86/include/asm/mmzone_32.h | 2 --
arch/x86/include/asm/mmzone_64.h | 2 --
arch/x86/mm/numa_64.c | 2 +-
include/linux/mm.h | 19 ++++++++++++++++---
mm/page_alloc.c | 8 +++++++-
7 files changed, 25 insertions(+), 14 deletions(-)
Index: mmotm-2.6.29-Feb11/include/linux/mm.h
===================================================================
--- mmotm-2.6.29-Feb11.orig/include/linux/mm.h
+++ mmotm-2.6.29-Feb11/include/linux/mm.h
@@ -1047,10 +1047,23 @@ extern void free_bootmem_with_active_reg
typedef int (*work_fn_t)(unsigned long, unsigned long, void *);
extern void work_with_active_regions(int nid, work_fn_t work_fn, void *data);
extern void sparse_memory_present_with_active_regions(int nid);
-#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
-extern int early_pfn_to_nid(unsigned long pfn);
-#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
#endif /* CONFIG_ARCH_POPULATES_NODE_MAP */
+
+#if !defined(CONFIG_ARCH_POPULATES_NODE_MAP) && \
+ !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID)
+static inline int __early_pfn_to_nid(unsigned long pfn)
+{
+ return 0;
+}
+#else
+/* please see mm/page_alloc.c */
+extern int __meminit early_pfn_to_nid(unsigned long pfn);
+#ifdef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
+/* there is a per-arch backend function. */
+extern int __meminit __early_pfn_to_nid(unsigned long pfn);
+#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
+#endif
+
extern void set_dma_reserve(unsigned long new_dma_reserve);
extern void memmap_init_zone(unsigned long, int, unsigned long,
unsigned long, enum memmap_context);
Index: mmotm-2.6.29-Feb11/arch/x86/include/asm/mmzone_32.h
===================================================================
--- mmotm-2.6.29-Feb11.orig/arch/x86/include/asm/mmzone_32.h
+++ mmotm-2.6.29-Feb11/arch/x86/include/asm/mmzone_32.h
@@ -32,8 +32,6 @@ static inline void get_memcfg_numa(void)
get_memcfg_numa_flat();
}
-extern int early_pfn_to_nid(unsigned long pfn);
-
extern void resume_map_numa_kva(pgd_t *pgd);
#else /* !CONFIG_NUMA */
Index: mmotm-2.6.29-Feb11/arch/x86/include/asm/mmzone_64.h
===================================================================
--- mmotm-2.6.29-Feb11.orig/arch/x86/include/asm/mmzone_64.h
+++ mmotm-2.6.29-Feb11/arch/x86/include/asm/mmzone_64.h
@@ -40,8 +40,6 @@ static inline __attribute__((pure)) int
#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
NODE_DATA(nid)->node_spanned_pages)
-extern int early_pfn_to_nid(unsigned long pfn);
-
#ifdef CONFIG_NUMA_EMU
#define FAKE_NODE_MIN_SIZE (64 * 1024 * 1024)
#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
Index: mmotm-2.6.29-Feb11/arch/ia64/include/asm/mmzone.h
===================================================================
--- mmotm-2.6.29-Feb11.orig/arch/ia64/include/asm/mmzone.h
+++ mmotm-2.6.29-Feb11/arch/ia64/include/asm/mmzone.h
@@ -31,10 +31,6 @@ static inline int pfn_to_nid(unsigned lo
#endif
}
-#ifdef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
-extern int early_pfn_to_nid(unsigned long pfn);
-#endif
-
#ifdef CONFIG_IA64_DIG /* DIG systems are small */
# define MAX_PHYSNODE_ID 8
# define NR_NODE_MEMBLKS (MAX_NUMNODES * 8)
Index: mmotm-2.6.29-Feb11/arch/ia64/mm/numa.c
===================================================================
--- mmotm-2.6.29-Feb11.orig/arch/ia64/mm/numa.c
+++ mmotm-2.6.29-Feb11/arch/ia64/mm/numa.c
@@ -58,7 +58,7 @@ paddr_to_nid(unsigned long paddr)
* SPARSEMEM to allocate the SPARSEMEM sectionmap on the NUMA node where
* the section resides.
*/
-int early_pfn_to_nid(unsigned long pfn)
+int __meminit __early_pfn_to_nid(unsigned long pfn)
{
int i, section = pfn >> PFN_SECTION_SHIFT, ssec, esec;
Index: mmotm-2.6.29-Feb11/arch/x86/mm/numa_64.c
===================================================================
--- mmotm-2.6.29-Feb11.orig/arch/x86/mm/numa_64.c
+++ mmotm-2.6.29-Feb11/arch/x86/mm/numa_64.c
@@ -166,7 +166,7 @@ int __init compute_hash_shift(struct boo
return shift;
}
-int early_pfn_to_nid(unsigned long pfn)
+int __meminit __early_pfn_to_nid(unsigned long pfn)
{
return phys_to_nid(pfn << PAGE_SHIFT);
}
Index: mmotm-2.6.29-Feb11/mm/page_alloc.c
===================================================================
--- mmotm-2.6.29-Feb11.orig/mm/page_alloc.c
+++ mmotm-2.6.29-Feb11/mm/page_alloc.c
@@ -2974,7 +2974,7 @@ static int __meminit next_active_region_
* was used and there are no special requirements, this is a convenient
* alternative
*/
-int __meminit early_pfn_to_nid(unsigned long pfn)
+int __meminit __early_pfn_to_nid(unsigned long pfn)
{
int i;
@@ -2990,6 +2990,12 @@ int __meminit early_pfn_to_nid(unsigned
}
#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
+int __meminit early_pfn_to_nid(unsigned long pfn)
+{
+ return __early_pfn_to_nid(pfn);
+}
+
+
/* Basic iterator support to walk early_node_map[] */
#define for_each_active_range_index_in_nid(i, nid) \
for (i = first_active_region_index_in_nid(nid); i != -1; \
--
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