[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>

3 files changed, 9 insertions, 9 deletions

diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
index 40d426cce824..4219dd2ce3a2 100644
--- a/arch/sparc/kernel/sun4d_smp.c
+++ b/arch/sparc/kernel/sun4d_smp.c
@@ -266,19 +266,19 @@ void __init smp4d_boot_cpus(void)
 
         /* Free unneeded trap tables */
         ClearPageReserved(virt_to_page(trapbase_cpu1));
-        set_page_count(virt_to_page(trapbase_cpu1), 1);
+        init_page_count(virt_to_page(trapbase_cpu1));
         free_page((unsigned long)trapbase_cpu1);
         totalram_pages++;
         num_physpages++;
 
         ClearPageReserved(virt_to_page(trapbase_cpu2));
-        set_page_count(virt_to_page(trapbase_cpu2), 1);
+        init_page_count(virt_to_page(trapbase_cpu2));
         free_page((unsigned long)trapbase_cpu2);
         totalram_pages++;
         num_physpages++;
 
         ClearPageReserved(virt_to_page(trapbase_cpu3));
-        set_page_count(virt_to_page(trapbase_cpu3), 1);
+        init_page_count(virt_to_page(trapbase_cpu3));
         free_page((unsigned long)trapbase_cpu3);
         totalram_pages++;
         num_physpages++;
diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index a21f27d10e55..fbbd8a474c4c 100644
--- a/arch/sparc/kernel/sun4m_smp.c
+++ b/arch/sparc/kernel/sun4m_smp.c
@@ -233,21 +233,21 @@ void __init smp4m_boot_cpus(void)
         /* Free unneeded trap tables */
         if (!cpu_isset(i, cpu_present_map)) {
                 ClearPageReserved(virt_to_page(trapbase_cpu1));
-                set_page_count(virt_to_page(trapbase_cpu1), 1);
+                init_page_count(virt_to_page(trapbase_cpu1));
                 free_page((unsigned long)trapbase_cpu1);
                 totalram_pages++;
                 num_physpages++;
         }
         if (!cpu_isset(2, cpu_present_map)) {
                 ClearPageReserved(virt_to_page(trapbase_cpu2));
-                set_page_count(virt_to_page(trapbase_cpu2), 1);
+                init_page_count(virt_to_page(trapbase_cpu2));
                 free_page((unsigned long)trapbase_cpu2);
                 totalram_pages++;
                 num_physpages++;
         }
         if (!cpu_isset(3, cpu_present_map)) {
                 ClearPageReserved(virt_to_page(trapbase_cpu3));
-                set_page_count(virt_to_page(trapbase_cpu3), 1);
+                init_page_count(virt_to_page(trapbase_cpu3));
                 free_page((unsigned long)trapbase_cpu3);
                 totalram_pages++;
                 num_physpages++;
diff --git a/arch/sparc/mm/init.c b/arch/sparc/mm/init.c
index c03babaa0498..898669732466 100644
--- a/arch/sparc/mm/init.c
+++ b/arch/sparc/mm/init.c
@@ -383,7 +383,7 @@ void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
                 struct page *page = pfn_to_page(tmp);
 
                 ClearPageReserved(page);
-                set_page_count(page, 1);
+                init_page_count(page);
                 __free_page(page);
                 totalhigh_pages++;
         }
@@ -480,7 +480,7 @@ void free_initmem (void)
                 p = virt_to_page(addr);
 
                 ClearPageReserved(p);
-                set_page_count(p, 1);
+                init_page_count(p);
                 __free_page(p);
                 totalram_pages++;
                 num_physpages++;
@@ -497,7 +497,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
                 struct page *p = virt_to_page(start);
 
                 ClearPageReserved(p);
-                set_page_count(p, 1);
+                init_page_count(p);
                 __free_page(p);
                 num_physpages++;
         }