From: Julien Grall Date: Fri, 7 Aug 2015 16:34:36 +0000 (+0100) Subject: arm/xen: implement correctly pfn_to_mfn X-Git-Tag: omap-for-v4.3/fixes-rc1~39^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5192b35de47e47a0f736fe30da199f32030680e7;p=pandora-kernel.git arm/xen: implement correctly pfn_to_mfn After the commit introducing convertion between DMA and guest addresses, all the callers of pfn_to_mfn are expecting to get a GFN (Guest Frame Number). On ARM, all the guests are auto-translated so the GFN is equal to the Linux PFN (Pseudo-physical Frame Number). The current implementation may return an MFN if the caller is passing a PFN associated to a mapped foreign grant. In pratice, I haven't seen the problem on running guest but we should fix it for the sake of correctness. Correct the implementation by always returning the pfn passed in parameter. A follow-up patch will take care to rename pfn_to_mfn to a suitable name. Signed-off-by: Julien Grall Reviewed-by: Stefano Stabellini Signed-off-by: David Vrabel --- Reading git-diff-tree failed