[3.19.y-ckt stable] Patch "of: return NUMA_NO_NODE from fallback of_node_to_nid()" has been added to staging queue
Kamal Mostafa
kamal at canonical.com
Thu Jul 16 01:07:34 UTC 2015
This is a note to let you know that I have just added a patch titled
of: return NUMA_NO_NODE from fallback of_node_to_nid()
to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue
This patch is scheduled to be released in version 3.19.y-ckt4.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
------
>From 98875d094b4353cdd77a69f80474d4f07dc0e40d Mon Sep 17 00:00:00 2001
From: Konstantin Khlebnikov <khlebnikov at yandex-team.ru>
Date: Wed, 8 Apr 2015 19:59:20 +0300
Subject: of: return NUMA_NO_NODE from fallback of_node_to_nid()
commit c8fff7bc5bba6bd59cad40441c189c4efe7190f6 upstream.
Node 0 might be offline as well as any other numa node,
in this case kernel cannot handle memory allocation and crashes.
Signed-off-by: Konstantin Khlebnikov <khlebnikov at yandex-team.ru>
Fixes: 0c3f061c195c ("of: implement of_node_to_nid as a weak function")
Signed-off-by: Grant Likely <grant.likely at linaro.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/of/base.c | 2 +-
include/linux/of.h | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 65a47f4..250a6a1 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -89,7 +89,7 @@ EXPORT_SYMBOL(of_n_size_cells);
#ifdef CONFIG_NUMA
int __weak of_node_to_nid(struct device_node *np)
{
- return numa_node_id();
+ return NUMA_NO_NODE;
}
#endif
diff --git a/include/linux/of.h b/include/linux/of.h
index dfde07e..78a04ee 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -623,7 +623,10 @@ static inline const char *of_prop_next_string(struct property *prop,
#if defined(CONFIG_OF) && defined(CONFIG_NUMA)
extern int of_node_to_nid(struct device_node *np);
#else
-static inline int of_node_to_nid(struct device_node *device) { return 0; }
+static inline int of_node_to_nid(struct device_node *device)
+{
+ return NUMA_NO_NODE;
+}
#endif
static inline struct device_node *of_find_matching_node(
--
1.9.1
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