[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>

6 files changed, 8 insertions, 8 deletions

diff --git a/arch/mips/arc/memory.c b/arch/mips/arc/memory.c
index 958d2eb78862..8a9ef58cc399 100644
--- a/arch/mips/arc/memory.c
+++ b/arch/mips/arc/memory.c
@@ -158,7 +158,7 @@ unsigned long __init prom_free_prom_memory(void)
                 while (addr < boot_mem_map.map[i].addr
                               + boot_mem_map.map[i].size) {
                         ClearPageReserved(virt_to_page(__va(addr)));
-                        set_page_count(virt_to_page(__va(addr)), 1);
+                        init_page_count(virt_to_page(__va(addr)));
                         free_page((unsigned long)__va(addr));
                         addr += PAGE_SIZE;
                         freed += PAGE_SIZE;
diff --git a/arch/mips/dec/prom/memory.c b/arch/mips/dec/prom/memory.c
index 81cb5a76cfb7..1edaf3074ee9 100644
--- a/arch/mips/dec/prom/memory.c
+++ b/arch/mips/dec/prom/memory.c
@@ -118,7 +118,7 @@ unsigned long __init prom_free_prom_memory(void)
         addr = PAGE_SIZE;
         while (addr < end) {
                 ClearPageReserved(virt_to_page(__va(addr)));
-                set_page_count(virt_to_page(__va(addr)), 1);
+                init_page_count(virt_to_page(__va(addr)));
                 free_page((unsigned long)__va(addr));
                 addr += PAGE_SIZE;
         }
diff --git a/arch/mips/mips-boards/generic/memory.c b/arch/mips/mips-boards/generic/memory.c
index 2c8afd77a20b..ee5e70c95cf3 100644
--- a/arch/mips/mips-boards/generic/memory.c
+++ b/arch/mips/mips-boards/generic/memory.c
@@ -174,7 +174,7 @@ unsigned long __init prom_free_prom_memory(void)
                 while (addr < boot_mem_map.map[i].addr
                               + boot_mem_map.map[i].size) {
                         ClearPageReserved(virt_to_page(__va(addr)));
-                        set_page_count(virt_to_page(__va(addr)), 1);
+                        init_page_count(virt_to_page(__va(addr)));
                         free_page((unsigned long)__va(addr));
                         addr += PAGE_SIZE;
                         freed += PAGE_SIZE;
diff --git a/arch/mips/mips-boards/sim/sim_mem.c b/arch/mips/mips-boards/sim/sim_mem.c
index 0dbd7435bb2a..1ec4e75656bd 100644
--- a/arch/mips/mips-boards/sim/sim_mem.c
+++ b/arch/mips/mips-boards/sim/sim_mem.c
@@ -117,7 +117,7 @@ unsigned long __init prom_free_prom_memory(void)
                 while (addr < boot_mem_map.map[i].addr
                               + boot_mem_map.map[i].size) {
                         ClearPageReserved(virt_to_page(__va(addr)));
-                        set_page_count(virt_to_page(__va(addr)), 1);
+                        init_page_count(virt_to_page(__va(addr)));
                         free_page((unsigned long)__va(addr));
                         addr += PAGE_SIZE;
                         freed += PAGE_SIZE;
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index a140da9732db..52f7d59fe612 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -245,7 +245,7 @@ void __init mem_init(void)
 #ifdef CONFIG_LIMITED_DMA
                 set_page_address(page, lowmem_page_address(page));
 #endif
-                set_page_count(page, 1);
+                init_page_count(page);
                 __free_page(page);
                 totalhigh_pages++;
         }
@@ -292,7 +292,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 
         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++;
         }
@@ -315,7 +315,7 @@ void free_initmem(void)
                 page = addr;
 #endif
                 ClearPageReserved(virt_to_page(page));
-                set_page_count(virt_to_page(page), 1);
+                init_page_count(virt_to_page(page));
                 free_page(page);
                 totalram_pages++;
                 freed += PAGE_SIZE;
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index ed93a9792959..e0d095daa5ed 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -559,7 +559,7 @@ void __init mem_init(void)
                                 /* if (!page_is_ram(pgnr)) continue; */
                                 /* commented out until page_is_ram works */
                                 ClearPageReserved(p);
-                                set_page_count(p, 1);
+                                init_page_count(p);
                                 __free_page(p);
                                 totalram_pages++;
                         }