The patch titled
kernel/resource.c: handle reinsertion of an already-inserted resource
has been added to the -mm tree. Its filename is
kernel-resourcec-handle-reinsertion-of-an-already-inserted-resource.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: kernel/resource.c: handle reinsertion of an already-inserted resource
From: Huang Shijie <shijie8@xxxxxxxxx>
If the same resource is inserted to the resource tree (maybe not on
purpose), a dead loop will be created. In this situation, The kernel does
not report any warning or error :(
The command below will show a endless print.
#cat /proc/iomem
[akpm@xxxxxxxxxxxxxxxxxxxx: add WARN_ON()]
Signed-off-by: Huang Shijie <shijie8@xxxxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/resource.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN kernel/resource.c~kernel-resourcec-handle-reinsertion-of-an-already-inserted-resource kernel/resource.c
--- a/kernel/resource.c~kernel-resourcec-handle-reinsertion-of-an-already-inserted-resource
+++ a/kernel/resource.c
@@ -453,6 +453,8 @@ static struct resource * __insert_resour
if (first == parent)
return first;
+ if (WARN_ON(first == new)) /* duplicated insertion */
+ return first;
if ((first->start > new->start) || (first->end < new->end))
break;
_
Patches currently in -mm which might be from shijie8@xxxxxxxxx are
kernel-resourcec-handle-reinsertion-of-an-already-inserted-resource.patch
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