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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 19:31:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 19:31:52 -0700 |
| commit | 958a2f29a6520a1d2973077ce7854ea9a44f48a2 (patch) | |
| tree | 918bc7a850bab351c2a91dbfea66f58d9258495d /arch/x86/pci/i386.c | |
| parent | 6de3d58dcfbab516dbe9aff36ea9542f40cd1bf2 (diff) | |
| parent | 895d30935ebe05f192e844792668bf8d19deaae7 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-fixes3
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-fixes3: (21 commits)
x86: numaq fix
x86: 8K stacks by default
x86: ioremap ram check fix
x86: fix HT cpu booting on 32-bit
x86: optimize inlining off
x86: CONFIG_X86_ELAN fix
x86: Kconfig fix
x86 PAT: fix performance drop for glx, use UC minus for ioremap(), ioremap_nocache() and pci_mmap_page_range()
x86: use defconfigs from x86/configs/*
toshiba: use ioremap_cached
revert: "x86: ioremap(), extend check to all RAM pages"
x86: don't bother printing compat vdso address
fix: x86: support for new UV apic
x86: fix early-BUG message
x86: iommu_sac_force can become static
x86: add proper header for reboot_force
x86 VISWS: build fix
x86, voyager: fix ioremap_nocache()
hpet: fix
x86: unexport kmap_atomic_to_page
...
Diffstat (limited to 'arch/x86/pci/i386.c')
| -rw-r--r-- | arch/x86/pci/i386.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 94f6c73a53d0..8af0f0bae2af 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -301,6 +301,13 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, prot = pgprot_val(vma->vm_page_prot); if (pat_wc_enabled && write_combine) prot |= _PAGE_CACHE_WC; + else if (pat_wc_enabled) + /* + * ioremap() and ioremap_nocache() defaults to UC MINUS for now. + * To avoid attribute conflicts, request UC MINUS here + * aswell. + */ + prot |= _PAGE_CACHE_UC_MINUS; else if (boot_cpu_data.x86 > 3) prot |= _PAGE_CACHE_UC; @@ -319,9 +326,8 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, * - request is uncached, return cannot be write-combine * - request is write-combine, return cannot be write-back */ - if ((flags == _PAGE_CACHE_UC && - (new_flags == _PAGE_CACHE_WB || - new_flags == _PAGE_CACHE_WC)) || + if ((flags == _PAGE_CACHE_UC_MINUS && + (new_flags == _PAGE_CACHE_WB)) || (flags == _PAGE_CACHE_WC && new_flags == _PAGE_CACHE_WB)) { free_memtype(addr, addr+len); |