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| author | Russ Anderson <rja@sgi.com> | 2012-05-10 13:01:46 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-05-20 22:56:33 +0100 |
| commit | eceb33799bdb35305f9af781d07caa10d05958fe (patch) | |
| tree | 013993af39f044b0de674221cae97eae81b0421a | |
| parent | 97a2373e32df28a6e59de89b725d4dbe58076a8d (diff) | |
| download | linux-stable-eceb33799bdb35305f9af781d07caa10d05958fe.tar.gz linux-stable-eceb33799bdb35305f9af781d07caa10d05958fe.tar.bz2 linux-stable-eceb33799bdb35305f9af781d07caa10d05958fe.zip | |
mm: nobootmem: fix sign extend problem in __free_pages_memory()
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 <rja@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | mm/nobootmem.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/nobootmem.c b/mm/nobootmem.c index 7fa41b4a07bf..07c08c4db1d2 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -83,8 +83,7 @@ void __init free_bootmem_late(unsigned long addr, unsigned long size) 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); |