Re: [patch 0/4] x86: PAT followup - Incremental changes and bugfixes

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxx> wrote:

> I.e. something like below?

or the one below. (it even builds)

	Ingo

---
 arch/x86/mm/pat.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Index: linux-x86.q/arch/x86/mm/pat.c
===================================================================
--- linux-x86.q.orig/arch/x86/mm/pat.c
+++ linux-x86.q/arch/x86/mm/pat.c
@@ -174,7 +174,12 @@ int reserve_mattr(u64 start, u64 end, un
 					current->comm, current->pid,
 					start, end,
 					cattr_name(attr), cattr_name(ml->attr));
-				err = -EBUSY;
+				/*
+				 * Force the already existing attribute:
+				 */
+				ma->attr = ml->attr;
+				if (*fattr)
+					*fattr = ml->attr;
 				break;
 			}
 		} else if (ml->start >= end) {
--
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