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| author | Ingo Molnar <mingo@elte.hu> | 2009-03-13 17:08:30 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-13 17:08:30 +0100 |
| commit | 063402356280a7b262952d6351d21315336f657b (patch) | |
| tree | e6fae7db15d0f4cbb9b9b7aa2b5bc176b4bf60f5 /arch/x86/mm/pageattr.c | |
| parent | f9a36fa5413f1b2694841c410a6fdb4666e78f16 (diff) | |
| parent | a98fe7f3425c6b4e90de16f8da63b0429a8fed08 (diff) | |
| download | kernel_goldelico_gta04-063402356280a7b262952d6351d21315336f657b.zip kernel_goldelico_gta04-063402356280a7b262952d6351d21315336f657b.tar.gz kernel_goldelico_gta04-063402356280a7b262952d6351d21315336f657b.tar.bz2 | |
Merge branch 'x86/core' into x86/kconfig
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 7233bd7..9c42949 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) { |