diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-01-30 13:32:58 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:58 +0100 |
| commit | 8405b122ad0dd75354b3bfed4de9a96514fd40cb (patch) | |
| tree | 764cb9bc9f262e1191ed8c2785042819dcf2db64 /include/asm-x86 | |
| parent | d8d89827fc0c9c2ea6ac4c22e14e30586a856f58 (diff) | |
x86: unify zero_page definition
Move ZERO_PAGE/empty_zero_page to common place.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/pgtable.h | 8 | ||||
| -rw-r--r-- | include/asm-x86/pgtable_32.h | 6 | ||||
| -rw-r--r-- | include/asm-x86/pgtable_64.h | 7 |
3 files changed, 8 insertions, 13 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 820db41dbe4..eb14a70a472 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -118,6 +118,14 @@ 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 d4d238c1029..eb8cccfa6a4 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 987f51f684a..435e17187eb 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__ */ /* |