From: Jeremy Fitzhardinge Date: Wed, 30 Jan 2008 12:32:58 +0000 (+0100) Subject: x86: unify zero_page definition X-Git-Tag: v2.6.25-rc1~1143^2~350 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8405b122ad0dd75354b3bfed4de9a96514fd40cb;p=linux-2.6 x86: unify zero_page definition Move ZERO_PAGE/empty_zero_page to common place. Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 820db41dbe..eb14a70a47 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -117,6 +117,14 @@ extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC; #ifndef __ASSEMBLY__ +/* + * ZERO_PAGE is a global shared page that is always zero: used + * for zero-mapped memory areas etc.. + */ +extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; +#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) + + /* * The following only work if pte_present() is true. * Undefined behaviour if not.. diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h index d4d238c102..eb8cccfa6a 100644 --- a/include/asm-x86/pgtable_32.h +++ b/include/asm-x86/pgtable_32.h @@ -25,12 +25,6 @@ struct mm_struct; struct vm_area_struct; -/* - * ZERO_PAGE is a global shared page that is always zero: used - * for zero-mapped memory areas etc.. - */ -#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) -extern unsigned long empty_zero_page[1024]; extern pgd_t swapper_pg_dir[1024]; extern struct kmem_cache *pmd_cache; extern spinlock_t pgd_lock; diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h index 987f51f684..435e17187e 100644 --- a/include/asm-x86/pgtable_64.h +++ b/include/asm-x86/pgtable_64.h @@ -23,13 +23,6 @@ extern pgd_t init_level4_pgt[]; extern void paging_init(void); extern void clear_kernel_mapping(unsigned long addr, unsigned long size); -/* - * ZERO_PAGE is a global shared page that is always zero: used - * for zero-mapped memory areas etc.. - */ -extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; -#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) - #endif /* !__ASSEMBLY__ */ /*