Commit-ID: ddd3509df8f8d4f1cf4784f559d702ce00dc8846
Gitweb: http://git.kernel.org/tip/ddd3509df8f8d4f1cf4784f559d702ce00dc8846
Author: Stefano Stabellini <[email protected]>
AuthorDate: Fri, 16 Nov 2012 19:39:05 -0800
Committer: H. Peter Anvin <[email protected]>
CommitDate: Sat, 17 Nov 2012 11:59:28 -0800
x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages
Add link for more information
279b706 x86,xen: introduce x86_init.mapping.pagetable_reserve
-v2: updated to commets from hpa to include commit name.
Signed-off-by: Yinghai Lu <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: H. Peter Anvin <[email protected]>
---
arch/x86/mm/init.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 02cea14..cb4f8ba 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -25,6 +25,15 @@ unsigned long __meminitdata pgt_buf_top;
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)
{
unsigned long pfn;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
