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| author | Yinghai Lu <yinghai@kernel.org> | 2012-11-16 19:38:49 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-17 11:59:09 -0800 |
| commit | 8eb5779f6b9c7e390c92f451edaafc039e06e743 (patch) | |
| tree | 6f1706d9fdf247b4c472d50187150f3c4ce1c787 /arch/x86/mm/pageattr.c | |
| parent | dda56e134059b840631fdfd034784056b627c2a6 (diff) | |
| download | op-kernel-dev-8eb5779f6b9c7e390c92f451edaafc039e06e743.zip op-kernel-dev-8eb5779f6b9c7e390c92f451edaafc039e06e743.tar.gz | |
x86, mm: use pfn_range_is_mapped() with CPA
We are going to map ram only, so under max_low_pfn_mapped,
between 4g and max_pfn_mapped does not mean mapped at all.
Use pfn_range_is_mapped() directly.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-13-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm/pageattr.c')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index a718e0d..44acfcd 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -551,16 +551,10 @@ static int split_large_page(pte_t *kpte, unsigned long address) for (i = 0; i < PTRS_PER_PTE; i++, pfn += pfninc) set_pte(&pbase[i], pfn_pte(pfn, ref_prot)); - if (address >= (unsigned long)__va(0) && - address < (unsigned long)__va(max_low_pfn_mapped << PAGE_SHIFT)) + if (pfn_range_is_mapped(PFN_DOWN(__pa(address)), + PFN_DOWN(__pa(address)) + 1)) split_page_count(level); -#ifdef CONFIG_X86_64 - if (address >= (unsigned long)__va(1UL<<32) && - address < (unsigned long)__va(max_pfn_mapped << PAGE_SHIFT)) - split_page_count(level); -#endif - /* * Install the new, split up pagetable. * @@ -729,13 +723,9 @@ static int cpa_process_alias(struct cpa_data *cpa) unsigned long vaddr; int ret; - if (cpa->pfn >= max_pfn_mapped) + if (!pfn_range_is_mapped(cpa->pfn, cpa->pfn + 1)) return 0; -#ifdef CONFIG_X86_64 - if (cpa->pfn >= max_low_pfn_mapped && cpa->pfn < (1UL<<(32-PAGE_SHIFT))) - return 0; -#endif /* * No need to redo, when the primary call touched the direct * mapping already: |
