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| author | Russ Anderson <rja@sgi.com> | 2012-05-10 13:01:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-10 15:06:44 -0700 |
| commit | 6bc2e853c6b46a6041980d58200ad9b0a73a60ff (patch) | |
| tree | 8e36db26a891ee14f9341eaa77f698aeb44301d7 /mm | |
| parent | b8cd742acfd78a4689148fb80cf74bc26e7f1f3c (diff) | |
| download | linux-3.10-6bc2e853c6b46a6041980d58200ad9b0a73a60ff.tar.gz linux-3.10-6bc2e853c6b46a6041980d58200ad9b0a73a60ff.tar.bz2 linux-3.10-6bc2e853c6b46a6041980d58200ad9b0a73a60ff.zip | |
mm: nobootmem: fix sign extend problem in __free_pages_memory()
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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -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 e53bb8a256b..1983fb1c702 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -82,8 +82,7 @@ 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); |