From cbe37d093707762fc0abb280781e6a82a9d8d568 Mon Sep 17 00:00:00 2001 From: Badari Pulavarty Date: Tue, 21 Jun 2005 17:14:52 -0700 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/frv/mm/init.c | 1 - arch/i386/mm/init.c | 1 - arch/mips/mm/init.c | 1 - arch/ppc/mm/init.c | 1 - arch/sparc/mm/init.c | 1 - arch/um/kernel/mem.c | 1 - include/linux/page-flags.h | 31 +++++++++++++++---------------- 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.. */ -#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.. */ +#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 -- 2.30.2