Commit ddd3509d authored by Stefano Stabellini's avatar Stefano Stabellini Committed by H. Peter Anvin
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x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages 



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	279b706b x86,xen: introduce x86_init.mapping.pagetable_reserve

-v2: updated to commets from hpa to include commit name.

Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-29-git-send-email-yinghai@kernel.org


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 22c8ca2a

arch/x86/mm/init.c

+9 −0
Original line number Original line Diff line number Diff line
@@ -25,6 +25,15 @@ unsigned long __meminitdata pgt_buf_top; 




static unsigned long min_pfn_mapped;

static unsigned long min_pfn_mapped;





/*

 * Pages returned are already directly mapped.

 *

 * Changing that is likely to break Xen, see commit:

 *

 *    279b706 x86,xen: introduce x86_init.mapping.pagetable_reserve

 *

 * for detailed information.

 */

__ref void *alloc_low_pages(unsigned int num)

__ref void *alloc_low_pages(unsigned int num)

{

{

	unsigned long pfn;

	unsigned long pfn;

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