mm: nobootmem: fix sign extend problem in __free_pages_memory()
authorRuss Anderson <rja@sgi.com>
Thu, 10 May 2012 20:01:46 +0000 (13:01 -0700)
committerVarun Wadekar <vwadekar@nvidia.com>
Fri, 18 May 2012 10:37:02 +0000 (15:37 +0530)
commit7cd79af3b375f5a94b14c503829210bb4e23136d
treeae21f62bb7989bcbdd9b14d585eb4cdbb69e387e
parent7a027cd7301846cf27fd238d38abba2b5823e80a
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>
mm/nobootmem.c