[PATCH] remove set_page_count() outside mm/
set_page_count usage outside mm/ is limited to setting the refcount to 1.
Remove set_page_count from outside mm/, and replace those users with
init_page_count() and set_page_refcounted().
This allows more debug checking, and tighter control on how code is allowed
to play around with page->_count.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 7d0d75c..b57fb3a 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -216,7 +216,7 @@
while (start < end) {
ClearPageReserved(virt_to_page(start));
- set_page_count(virt_to_page(start), 1);
+ init_page_count(virt_to_page(start));
free_page(start);
cnt++;
start += PAGE_SIZE;
@@ -248,7 +248,7 @@
printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
for (; start < end; start += PAGE_SIZE) {
ClearPageReserved(virt_to_page(start));
- set_page_count(virt_to_page(start), 1);
+ init_page_count(virt_to_page(start));
free_page(start);
totalram_pages++;
}
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 81cfb0c..bacb71c 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -140,7 +140,7 @@
for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
memset((void *)addr, 0xcc, PAGE_SIZE);
ClearPageReserved(virt_to_page(addr));
- set_page_count(virt_to_page(addr), 1);
+ init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
}
@@ -155,7 +155,7 @@
printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
for (; start < end; start += PAGE_SIZE) {
ClearPageReserved(virt_to_page(start));
- set_page_count(virt_to_page(start), 1);
+ init_page_count(virt_to_page(start));
free_page(start);
totalram_pages++;
}
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 6ae5c13..454cac0 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -108,7 +108,7 @@
void online_page(struct page *page)
{
ClearPageReserved(page);
- set_page_count(page, 1);
+ init_page_count(page);
__free_page(page);
totalram_pages++;
num_physpages++;
@@ -376,7 +376,7 @@
struct page *page = pfn_to_page(pfn);
ClearPageReserved(page);
- set_page_count(page, 1);
+ init_page_count(page);
__free_page(page);
totalhigh_pages++;
}
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index b33a444..fec8e65 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -115,7 +115,7 @@
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
struct page *page = pfn_to_page(pfn);
set_page_links(page, ZONE_DMA, node_id, pfn);
- set_page_count(page, 1);
+ init_page_count(page);
reset_page_mapcount(page);
SetPageReserved(page);
INIT_LIST_HEAD(&page->lru);