From: Zoltan Kiss Date: Thu, 27 Feb 2014 15:55:30 +0000 (+0000) Subject: xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override X-Git-Tag: v3.15-rc1~108^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1429d46df4c538d28460d0b493997006a62a1093;p=pandora-kernel.git xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override The grant mapping API does m2p_override unnecessarily: only gntdev needs it, for blkback and future netback patches it just cause a lock contention, as those pages never go to userspace. Therefore this series does the following: - the bulk of the original function (everything after the mapping hypercall) is moved to arch-dependent set/clear_foreign_p2m_mapping - the "if (xen_feature(XENFEAT_auto_translated_physmap))" branch goes to ARM - therefore the ARM function could be much smaller, the m2p_override stubs could be also removed - on x86 the set_phys_to_machine calls were moved up to this new funcion from m2p_override functions - and m2p_override functions are only called when there is a kmap_ops param It also removes a stray space from arch/x86/include/asm/xen/page.h. Signed-off-by: Zoltan Kiss Suggested-by: Anthony Liguori Suggested-by: David Vrabel Suggested-by: Stefano Stabellini Signed-off-by: David Vrabel Signed-off-by: Stefano Stabellini --- Reading git-diff-tree failed