This is a note to let you know that I've just added the patch titled
mm: nobootmem: fix sign extend problem in __free_pages_memory()
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-nobootmem-fix-sign-extend-problem-in-__free_pages_memory.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6bc2e853c6b46a6041980d58200ad9b0a73a60ff Mon Sep 17 00:00:00 2001
From: Russ Anderson <[email protected]>
Date: Thu, 10 May 2012 13:01:46 -0700
Subject: mm: nobootmem: fix sign extend problem in __free_pages_memory()
From: Russ Anderson <[email protected]>
commit 6bc2e853c6b46a6041980d58200ad9b0a73a60ff upstream.
Systems with 8 TBytes of memory or greater can hit a problem where only
the the first 8 TB of memory shows up. This is due to "int i" being
smaller than "unsigned long start_aligned", causing the high bits to be
dropped.
The fix is to change `i' to unsigned long to match start_aligned
and end_aligned.
Thanks to Jack Steiner for assistance tracking this down.
Signed-off-by: Russ Anderson <[email protected]>
Cc: Jack Steiner <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Yinghai Lu <[email protected]>
Cc: Gavin Shan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
mm/nobootmem.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -83,8 +83,7 @@ void __init free_bootmem_late(unsigned l
static void __init __free_pages_memory(unsigned long start, unsigned long end)
{
- int i;
- unsigned long start_aligned, end_aligned;
+ unsigned long i, start_aligned, end_aligned;
int order = ilog2(BITS_PER_LONG);
start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/mm-nobootmem-fix-sign-extend-problem-in-__free_pages_memory.patch
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