From: David Vrabel Date: Tue, 7 Jan 2014 17:03:06 +0000 (+0000) Subject: x86: remove the Xen-specific _PAGE_IOMAP PTE flag X-Git-Tag: fixes-against-v3.18-rc2~118^2~9 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f955371ca9d3986bca100666041fcfa9b6d21962;p=pandora-kernel.git x86: remove the Xen-specific _PAGE_IOMAP PTE flag The _PAGE_IO_MAP PTE flag was only used by Xen PV guests to mark PTEs that were used to map I/O regions that are 1:1 in the p2m. This allowed Xen to obtain the correct PFN when converting the MFNs read from a PTE back to their PFN. Xen guests no longer use _PAGE_IOMAP for this. Instead mfn_to_pfn() returns the correct PFN by using a combination of the m2p and p2m to determine if an MFN corresponds to a 1:1 mapping in the the p2m. Remove _PAGE_IOMAP, replacing it with _PAGE_UNUSED2 to allow for future uses of the PTE flag. Signed-off-by: David Vrabel Acked-by: "H. Peter Anvin" --- Reading git-diff-tree failed