Patchwork [3.5.y.z,extended,stable] Patch "sparc64 address-congruence property" has been added to staging queue

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Submitter Luis Henriques
Date July 25, 2013, 2:42 p.m.
Message ID <>
Download mbox | patch
Permalink /patch/261731/
State Not Applicable
Delegated to: David Miller
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Luis Henriques - July 25, 2013, 2:42 p.m.
This is a note to let you know that I have just added a patch titled

    sparc64 address-congruence property

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



From d90eb705217bc5876eb6547a5a9ae39a1ef8fcb6 Mon Sep 17 00:00:00 2001
From: bob picco <>
Date: Tue, 11 Jun 2013 14:54:51 -0400
Subject: [PATCH] sparc64 address-congruence property

commit 771a37ff4d80b80db3b0df3e7696f14b298c67b7 upstream.

The Machine Description (MD) property "address-congruence-offset" is
optional. According to the MD specification the value is assumed 0UL when
not present. This caused early boot failure on T5.

Signed-off-by: Bob Picco <>
Signed-off-by: David S. Miller <>
Signed-off-by: Luis Henriques <>
 arch/sparc/mm/init_64.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)


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diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index d58edf5..f2ace29 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -1049,7 +1049,14 @@  static int __init grab_mblocks(struct mdesc_handle *md)
 		m->size = *val;
 		val = mdesc_get_property(md, node,
 					 "address-congruence-offset", NULL);
-		m->offset = *val;
+		/* The address-congruence-offset property is optional.
+		 * Explicity zero it be identifty this.
+		 */
+		if (val)
+			m->offset = *val;
+		else
+			m->offset = 0UL;

 		numadbg("MBLOCK[%d]: base[%llx] size[%llx] offset[%llx]\n",
 			count - 1, m->base, m->size, m->offset);