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Red Hat Bugzilla – Attachment 154636 Details for
Bug 240006
mmap of VGA frame buffer causes MCA on ia64
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[patch]
legacy mem patch
ia64-legacy_mem-wb (text/plain), 917 bytes, created by
Martin Poole
on 2007-05-14 10:59:22 UTC
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Description:
legacy mem patch
Filename:
MIME Type:
Creator:
Martin Poole
Created:
2007-05-14 10:59:22 UTC
Size:
917 bytes
patch
obsolete
>[PATCH] ia64: allow WB /sys/.../legacy_mem mmaps > >Allow cacheable mmaps of legacy_mem if WB access is supported for the region. >The "legacy_mem" file often contains a shadow option ROM, and some versions of >X depend on this. > >Tim Yamin <plasm@roo.me.uk> reported that this change fixes X on a Dell >PowerEdge 3250. > >Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> > >Index: linux-2.6.18.ia64/arch/ia64/pci/pci.c >=================================================================== >--- linux-2.6.18.ia64.orig/arch/ia64/pci/pci.c 2007-03-23 05:18:33.000000000 -0600 >+++ linux-2.6.18.ia64/arch/ia64/pci/pci.c 2007-03-23 06:45:09.000000000 -0600 >@@ -655,8 +655,6 @@ > return -EINVAL; > prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size, > vma->vm_page_prot); >- if (pgprot_val(prot) != pgprot_val(pgprot_noncached(vma->vm_page_prot))) >- return -EINVAL; > > addr = pci_get_legacy_mem(bus); > if (IS_ERR(addr))
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