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| author | venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> | 2009-01-09 16:13:10 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-13 19:13:00 +0100 |
| commit | afc7d20c8429f32f19d47367fdc36eeed2334ec3 (patch) | |
| tree | e817ea903498dcce184a758efb44d6e29223cfa3 /arch/x86/pci/i386.c | |
| parent | a36706131182f5507d1e2cfbf391b0fa8d72203c (diff) | |
| download | blackbird-op-linux-afc7d20c8429f32f19d47367fdc36eeed2334ec3.tar.gz blackbird-op-linux-afc7d20c8429f32f19d47367fdc36eeed2334ec3.zip | |
x86 PAT: consolidate old memtype new memtype check into a function
Impact: cleanup
Move the new memtype old memtype allowed check to header so that is can be
shared by other users. Subsequent patch uses this in pat.c in remap_pfn_range()
code path. No functionality change in this patch.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/pci/i386.c')
| -rw-r--r-- | arch/x86/pci/i386.c | 12 |
1 files changed, 1 insertions, 11 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index f884740da318..5ead808dd70c 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -314,17 +314,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, return retval; if (flags != new_flags) { - /* - * Do not fallback to certain memory types with certain - * requested type: - * - request is uncached, return cannot be write-back - * - request is uncached, return cannot be write-combine - * - request is write-combine, return cannot be write-back - */ - if ((flags == _PAGE_CACHE_UC_MINUS && - (new_flags == _PAGE_CACHE_WB)) || - (flags == _PAGE_CACHE_WC && - new_flags == _PAGE_CACHE_WB)) { + if (!is_new_memtype_allowed(flags, new_flags)) { free_memtype(addr, addr+len); return -EINVAL; } |
