[RFC PATCH v1 19/19] mm: call register_page_bootmem_info_node() from mm core

[Jiang Liu]

Function register_page_bootmem_info_node() is suitably defined for
both HOTPLUG and non-HOTPLUG configurations, so we could call it
from mm core instead of arch specific code. This could simplify
arch implementations.

Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
---
 arch/sparc/mm/init_64.c |   12 ------------
 arch/x86/mm/init_64.c   |   12 ------------
 mm/bootmem.c            |    6 ++++++
 mm/nobootmem.c          |    6 ++++++
 4 files changed, 12 insertions(+), 24 deletions(-)

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index b1e35b7..5530c09 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2027,16 +2027,6 @@ static void __init patch_tlb_miss_handler_bitmap(void)
 	flushi(&valid_addr_bitmap_insn[0]);
 }
 
-static void __init register_page_bootmem_info(void)
-{
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-	int i;
-
-	for_each_online_node(i)
-		if (NODE_DATA(i)->node_spanned_pages)
-			register_page_bootmem_info_node(NODE_DATA(i));
-#endif
-}
 void __init mem_init(void)
 {
 	unsigned long addr, last;
@@ -2052,8 +2042,6 @@ void __init mem_init(void)
 	patch_tlb_miss_handler_bitmap();
 
 	high_memory = __va(last_valid_pfn << PAGE_SHIFT);
-
-	register_page_bootmem_info();
 	free_all_bootmem();
 
 	/*
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 650264b..72b5141 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1031,24 +1031,12 @@ int __ref arch_remove_memory(u64 start, u64 size)
 
 static struct kcore_list kcore_vsyscall;
 
-static void __init register_page_bootmem_info(void)
-{
-#ifdef CONFIG_NUMA
-	int i;
-
-	for_each_online_node(i)
-		register_page_bootmem_info_node(NODE_DATA(i));
-#endif
-}
-
 void __init mem_init(void)
 {
 	pci_iommu_alloc();
 
 	/* clear_bss() already clear the empty_zero_page */
 
-	register_page_bootmem_info();
-
 	/* this will put all memory onto the freelists */
 	free_all_bootmem();
 	after_bootmem = 1;
diff --git a/mm/bootmem.c b/mm/bootmem.c
index fab8f63..3cf36ac 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -273,6 +273,12 @@ unsigned long __init free_all_bootmem(void)
 {
 	unsigned long total_pages = 0;
 	bootmem_data_t *bdata;
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+	pg_data_t *pgdat;
+
+	for_each_online_pgdat(pgdat)
+		register_page_bootmem_info_node(pgdat);
+#endif
 
 	reset_all_zones_managed_pages();
 
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 6b63cd6..ccc6630 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -166,6 +166,12 @@ void __init reset_all_zones_managed_pages(void)
 unsigned long __init free_all_bootmem(void)
 {
 	unsigned long pages;
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+	pg_data_t *pgdat;
+
+	for_each_online_pgdat(pgdat)
+		register_page_bootmem_info_node(pgdat);
+#endif
 
 	reset_all_zones_managed_pages();
 
-- 
1.7.9.5

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