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authorJeremy Fitzhardinge <jeremy@goop.org>2008-03-17 16:37:13 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-24 23:57:31 +0200
commit68db065c845bd9d0eb96946ab104b4c82d0ae9da (patch)
treea12f007e11538af668227d6da1c476af6329899f /arch/x86/mm
parent90e9f53662826db3cdd6d99bd394d727b05160c1 (diff)
x86: unify KERNEL_PGD_PTRS
Make KERNEL_PGD_PTRS common, as previously it was only being defined for 32-bit. There are a couple of follow-on changes from this: - KERNEL_PGD_PTRS was being defined in terms of USER_PGD_PTRS. The definition of USER_PGD_PTRS doesn't really make much sense on x86-64, since it can have two different user address-space configurations. I renamed USER_PGD_PTRS to KERNEL_PGD_BOUNDARY, which is meaningful for all of 32/32, 32/64 and 64/64 process configurations. - USER_PTRS_PER_PGD was also defined and was being used for similar purposes. Converting its users to KERNEL_PGD_BOUNDARY left it completely unused, and so I removed it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Andi Kleen <ak@suse.de> Cc: Zach Amsden <zach@vmware.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/init_32.c2
-rw-r--r--arch/x86/mm/pgtable.c12
2 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index df490905f37..08aa1878fad 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -457,7 +457,7 @@ void zap_low_mappings(void)
* Note that "pgd_clear()" doesn't do it for
* us, because pgd_clear() is a no-op on i386.
*/
- for (i = 0; i < USER_PTRS_PER_PGD; i++) {
+ for (i = 0; i < KERNEL_PGD_BOUNDARY; i++) {
#ifdef CONFIG_X86_PAE
set_pgd(swapper_pg_dir+i, __pgd(1 + __pa(empty_zero_page)));
#else
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index af0c50161d9..e2ac320e615 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -104,7 +104,7 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd)
* -- wli
*/
#define UNSHARED_PTRS_PER_PGD \
- (SHARED_KERNEL_PMD ? USER_PTRS_PER_PGD : PTRS_PER_PGD)
+ (SHARED_KERNEL_PMD ? KERNEL_PGD_BOUNDARY : PTRS_PER_PGD)
static void pgd_ctor(void *p)
{
@@ -112,7 +112,7 @@ static void pgd_ctor(void *p)
unsigned long flags;
/* Clear usermode parts of PGD */
- memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
+ memset(pgd, 0, KERNEL_PGD_BOUNDARY*sizeof(pgd_t));
spin_lock_irqsave(&pgd_lock, flags);
@@ -121,12 +121,12 @@ static void pgd_ctor(void *p)
references from swapper_pg_dir. */
if (PAGETABLE_LEVELS == 2 ||
(PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD)) {
- clone_pgd_range(pgd + USER_PTRS_PER_PGD,
- swapper_pg_dir + USER_PTRS_PER_PGD,
+ clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
+ swapper_pg_dir + KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
paravirt_alloc_pmd_clone(__pa(pgd) >> PAGE_SHIFT,
__pa(swapper_pg_dir) >> PAGE_SHIFT,
- USER_PTRS_PER_PGD,
+ KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
}
@@ -201,7 +201,7 @@ static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
return 0;
}
- if (i >= USER_PTRS_PER_PGD)
+ if (i >= KERNEL_PGD_BOUNDARY)
memcpy(pmd, (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
sizeof(pmd_t) * PTRS_PER_PMD);