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authorJeremy Fitzhardinge <jeremy@goop.org>2008-04-28 02:12:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:17 -0700
commit180c06efce691f2b721dd0d965079827bdd7ee03 (patch)
tree6d5dbde8f341544bbd212e9d376af1e7880a4229 /arch
parentea01ea937dcae2caa146dea1918cccf2f16ed3c4 (diff)
downloadop-kernel-dev-180c06efce691f2b721dd0d965079827bdd7ee03.zip
op-kernel-dev-180c06efce691f2b721dd0d965079827bdd7ee03.tar.gz
hotplug-memory: make online_page() common
All architectures use an effectively identical definition of online_page(), so just make it common code. x86-64, ia64, powerpc and sh are actually identical; x86-32 is slightly different. x86-32's differences arise because it puts its hotplug pages in the highmem zone. We can handle this in the generic code by inspecting the page to see if its in highmem, and update the totalhigh_pages count appropriately. This leaves init_32.c:free_new_highpage with a single caller, so I folded it into add_one_highpage_init. I also removed an incorrect comment referring to the NUMA case; any NUMA details have already been dealt with by the time online_page() is called. [akpm@linux-foundation.org: fix indenting] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Dave Hansen <dave@linux.vnet.ibm.com> Reviewed-by: KAMEZAWA Hiroyuki <kamez.hiroyu@jp.fujitsu.com> Tested-by: KAMEZAWA Hiroyuki <kamez.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Christoph Lameter <clameter@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/mm/init.c9
-rw-r--r--arch/powerpc/mm/mem.c9
-rw-r--r--arch/sh/mm/init.c9
-rw-r--r--arch/x86/mm/init_32.c36
-rw-r--r--arch/x86/mm/init_64.c9
5 files changed, 3 insertions, 69 deletions
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 5c1de53..fc6c663 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -682,15 +682,6 @@ mem_init (void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
-void online_page(struct page *page)
-{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalram_pages++;
- num_physpages++;
-}
-
int arch_add_memory(int nid, u64 start, u64 size)
{
pg_data_t *pgdat;
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 5ccb579..d9e37f3 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -110,15 +110,6 @@ EXPORT_SYMBOL(phys_mem_access_prot);
#ifdef CONFIG_MEMORY_HOTPLUG
-void online_page(struct page *page)
-{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalram_pages++;
- num_physpages++;
-}
-
#ifdef CONFIG_NUMA
int memory_add_physaddr_to_nid(u64 start)
{
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 53dde06..d7df26b 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -307,15 +307,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
#endif
#ifdef CONFIG_MEMORY_HOTPLUG
-void online_page(struct page *page)
-{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalram_pages++;
- num_physpages++;
-}
-
int arch_add_memory(int nid, u64 start, u64 size)
{
pg_data_t *pgdat;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 4a47618..de236e4 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -287,47 +287,17 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base)
pkmap_page_table = pte;
}
-static void __meminit free_new_highpage(struct page *page)
-{
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
-}
-
void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
{
if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
ClearPageReserved(page);
- free_new_highpage(page);
+ init_page_count(page);
+ __free_page(page);
+ totalhigh_pages++;
} else
SetPageReserved(page);
}
-static int __meminit
-add_one_highpage_hotplug(struct page *page, unsigned long pfn)
-{
- free_new_highpage(page);
- totalram_pages++;
-#ifdef CONFIG_FLATMEM
- max_mapnr = max(pfn, max_mapnr);
-#endif
- num_physpages++;
-
- return 0;
-}
-
-/*
- * Not currently handling the NUMA case.
- * Assuming single node and all memory that
- * has been added dynamically that would be
- * onlined here is in HIGHMEM.
- */
-void __meminit online_page(struct page *page)
-{
- ClearPageReserved(page);
- add_one_highpage_hotplug(page, page_to_pfn(page));
-}
-
#ifndef CONFIG_NUMA
static void __init set_highmem_pages_init(int bad_ppro)
{
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5fbb865..32ba13b 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -620,15 +620,6 @@ void __init paging_init(void)
/*
* Memory hotplug specific functions
*/
-void online_page(struct page *page)
-{
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalram_pages++;
- num_physpages++;
-}
-
#ifdef CONFIG_MEMORY_HOTPLUG
/*
* Memory is added always to NORMAL zone. This means you will never get
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