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author | H. Peter Anvin <hpa@linux.intel.com> | 2013-01-25 16:31:21 -0800 |
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committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-01-25 16:31:21 -0800 |
commit | 7b5c4a65cc27f017c170b025f8d6d75dabb11c6f (patch) | |
tree | 05deacbc66a9f5c27147a6ea975211ae82281044 /arch/x86/mm/pgtable.c | |
parent | 3596f5bb0a6afd01a784bfe120f420edbbf82861 (diff) | |
parent | 949db153b6466c6f7cad5a427ecea94985927311 (diff) | |
download | op-kernel-dev-7b5c4a65cc27f017c170b025f8d6d75dabb11c6f.zip op-kernel-dev-7b5c4a65cc27f017c170b025f8d6d75dabb11c6f.tar.gz |
Merge tag 'v3.8-rc5' into x86/mm
The __pa() fixup series that follows touches KVM code that is not
present in the existing branch based on v3.7-rc5, so merge in the
current upstream from Linus.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm/pgtable.c')
-rw-r--r-- | arch/x86/mm/pgtable.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 8a828d7..193350b 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -137,7 +137,7 @@ static void pgd_dtor(pgd_t *pgd) * against pageattr.c; it is the unique case in which a valid change * of kernel pagetables can't be lazily synchronized by vmalloc faults. * vmalloc faults work because attached pagetables are never freed. - * -- wli + * -- nyc */ #ifdef CONFIG_X86_PAE @@ -301,6 +301,13 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd) free_page((unsigned long)pgd); } +/* + * Used to set accessed or dirty bits in the page table entries + * on other architectures. On x86, the accessed and dirty bits + * are tracked by hardware. However, do_wp_page calls this function + * to also make the pte writeable at the same time the dirty bit is + * set. In that case we do actually need to write the PTE. + */ int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address, pte_t *ptep, pte_t entry, int dirty) @@ -310,7 +317,6 @@ int ptep_set_access_flags(struct vm_area_struct *vma, if (changed && dirty) { *ptep = entry; pte_update_defer(vma->vm_mm, address, ptep); - flush_tlb_page(vma, address); } return changed; |