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authorBadari Pulavarty <pbadari@us.ibm.com>2005-06-22 04:14:52 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-22 05:46:17 +0400
commitcbe37d093707762fc0abb280781e6a82a9d8d568 (patch)
tree8af4a268765346655291f1ef27df12d11825269c
parent73219d178051691a56d57184d8c7f6d0cbe3c5c1 (diff)
downloadlinux-cbe37d093707762fc0abb280781e6a82a9d8d568.tar.xz
[PATCH] mm: remove PG_highmem
Remove PG_highmem, to save a page flag. Use is_highmem() instead. It'll generate a little more code, but we don't use PageHigheMem() in many places. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/frv/mm/init.c1
-rw-r--r--arch/i386/mm/init.c1
-rw-r--r--arch/mips/mm/init.c1
-rw-r--r--arch/ppc/mm/init.c1
-rw-r--r--arch/sparc/mm/init.c1
-rw-r--r--arch/um/kernel/mem.c1
-rw-r--r--include/linux/page-flags.h31
7 files changed, 15 insertions, 22 deletions
diff --git a/arch/frv/mm/init.c b/arch/frv/mm/init.c
index 41958f57c838..79433159b5f0 100644
--- a/arch/frv/mm/init.c
+++ b/arch/frv/mm/init.c
@@ -169,7 +169,6 @@ void __init mem_init(void)
struct page *page = &mem_map[pfn];
ClearPageReserved(page);
- set_bit(PG_highmem, &page->flags);
set_page_count(page, 1);
__free_page(page);
totalram_pages++;
diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c
index 7a7ea3737265..8766c771bb45 100644
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -269,7 +269,6 @@ void __init one_highpage_init(struct page *page, int pfn, int bad_ppro)
{
if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
ClearPageReserved(page);
- set_bit(PG_highmem, &page->flags);
set_page_count(page, 1);
__free_page(page);
totalhigh_pages++;
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index b027ce7efbc6..73843c528778 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -232,7 +232,6 @@ void __init mem_init(void)
#ifdef CONFIG_LIMITED_DMA
set_page_address(page, lowmem_page_address(page));
#endif
- set_bit(PG_highmem, &page->flags);
set_page_count(page, 1);
__free_page(page);
totalhigh_pages++;
diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
index 363c157e3617..c8529d004cfa 100644
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c
@@ -469,7 +469,6 @@ void __init mem_init(void)
struct page *page = mem_map + pfn;
ClearPageReserved(page);
- set_bit(PG_highmem, &page->flags);
set_page_count(page, 1);
__free_page(page);
totalhigh_pages++;
diff --git a/arch/sparc/mm/init.c b/arch/sparc/mm/init.c
index a2dea69b2f07..ec2e05028a10 100644
--- a/arch/sparc/mm/init.c
+++ b/arch/sparc/mm/init.c
@@ -384,7 +384,6 @@ void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
struct page *page = pfn_to_page(tmp);
ClearPageReserved(page);
- set_bit(PG_highmem, &page->flags);
set_page_count(page, 1);
__free_page(page);
totalhigh_pages++;
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index c22825f13e40..5597bd39e6b5 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -53,7 +53,6 @@ static void setup_highmem(unsigned long highmem_start,
for(i = 0; i < highmem_len >> PAGE_SHIFT; i++){
page = &mem_map[highmem_pfn + i];
ClearPageReserved(page);
- set_bit(PG_highmem, &page->flags);
set_page_count(page, 1);
__free_page(page);
}
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 39ab8c6b5652..df313891db10 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -61,21 +61,20 @@
#define PG_active 6
#define PG_slab 7 /* slab debug (Suparna wants this) */
-#define PG_highmem 8
-#define PG_checked 9 /* kill me in 2.5.<early>. */
-#define PG_arch_1 10
-#define PG_reserved 11
-
-#define PG_private 12 /* Has something at ->private */
-#define PG_writeback 13 /* Page is under writeback */
-#define PG_nosave 14 /* Used for system suspend/resume */
-#define PG_compound 15 /* Part of a compound page */
-
-#define PG_swapcache 16 /* Swap page: swp_entry_t in private */
-#define PG_mappedtodisk 17 /* Has blocks allocated on-disk */
-#define PG_reclaim 18 /* To be reclaimed asap */
-#define PG_nosave_free 19 /* Free, should not be written */
-#define PG_uncached 20 /* Page has been mapped as uncached */
+#define PG_checked 8 /* kill me in 2.5.<early>. */
+#define PG_arch_1 9
+#define PG_reserved 10
+#define PG_private 11 /* Has something at ->private */
+
+#define PG_writeback 12 /* Page is under writeback */
+#define PG_nosave 13 /* Used for system suspend/resume */
+#define PG_compound 14 /* Part of a compound page */
+#define PG_swapcache 15 /* Swap page: swp_entry_t in private */
+
+#define PG_mappedtodisk 16 /* Has blocks allocated on-disk */
+#define PG_reclaim 17 /* To be reclaimed asap */
+#define PG_nosave_free 18 /* Free, should not be written */
+#define PG_uncached 19 /* Page has been mapped as uncached */
/*
* Global page accounting. One instance per CPU. Only unsigned longs are
@@ -215,7 +214,7 @@ extern void __mod_page_state(unsigned offset, unsigned long delta);
#define TestSetPageSlab(page) test_and_set_bit(PG_slab, &(page)->flags)
#ifdef CONFIG_HIGHMEM
-#define PageHighMem(page) test_bit(PG_highmem, &(page)->flags)
+#define PageHighMem(page) is_highmem(page_zone(page))
#else
#define PageHighMem(page) 0 /* needed to optimize away at compile time */
#endif