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author | H. Peter Anvin <hpa@zytor.com> | 2009-02-24 16:11:51 -0800 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2009-02-24 16:11:51 -0800 |
commit | 638bee71c83a2837b48062fdc5b222163cf53d79 (patch) | |
tree | 9c1699c07a5aa547d769138317279b8ee1ba89e8 /arch/x86/mm/pageattr.c | |
parent | 2aaa822984b97efd894d10d1e1382206ef0291a7 (diff) | |
parent | a852cbfaaf8122827602027b1614971cfd832304 (diff) |
Merge branch 'x86/core' into x86/mce2
Diffstat (limited to 'arch/x86/mm/pageattr.c')
-rw-r--r-- | arch/x86/mm/pageattr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 7be47d1a97e..8253bc97587 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -482,6 +482,13 @@ static int split_large_page(pte_t *kpte, unsigned long address) pbase = (pte_t *)page_address(base); paravirt_alloc_pte(&init_mm, page_to_pfn(base)); ref_prot = pte_pgprot(pte_clrhuge(*kpte)); + /* + * If we ever want to utilize the PAT bit, we need to + * update this function to make sure it's converted from + * bit 12 to bit 7 when we cross from the 2MB level to + * the 4K level: + */ + WARN_ON_ONCE(pgprot_val(ref_prot) & _PAGE_PAT_LARGE); #ifdef CONFIG_X86_64 if (level == PG_LEVEL_1G) { |