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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-03-18 00:37:13 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:57:31 +0200 |
| commit | 68db065c845bd9d0eb96946ab104b4c82d0ae9da (patch) | |
| tree | a12f007e11538af668227d6da1c476af6329899f /arch/x86/mm | |
| parent | xen: make sure iret faults are trapped (diff) | |
| download | linux-68db065c845bd9d0eb96946ab104b4c82d0ae9da.tar.xz linux-68db065c845bd9d0eb96946ab104b4c82d0ae9da.zip | |
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.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/pgtable.c | 12 |
2 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index df490905f377..08aa1878fad4 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 af0c50161d95..e2ac320e6151 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); |