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authorJuergen Gross <jgross@suse.com>2015-07-17 07:51:33 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2015-08-20 14:24:22 +0300
commit2592dbbbf4c67501c2bd2dcf89c2b8924d592a9f (patch)
treede5834b2dfbd829951b8dc93c8ecd98b1d3b7de2 /net/can
parent4b9c15377f96e241be347fd3bbeeff74fbad0b44 (diff)
downloadlinux-2592dbbbf4c67501c2bd2dcf89c2b8924d592a9f.tar.xz
mm: provide early_memremap_ro to establish read-only mapping
During early boot as Xen pv domain the kernel needs to map some page tables supplied by the hypervisor read only. This is needed to be able to relocate some data structures conflicting with the physical memory map especially on systems with huge RAM (above 512GB). Provide the function early_memremap_ro() to provide this read only mapping. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Konrad Rzeszutek Wilk <Konrad.wilk@oracle.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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