[ 33/54] mm: nobootmem: fix sign extend problem in __free_pages_memory()

[Greg KH]

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Russ Anderson <rja@xxxxxxx>

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@xxxxxxx>
Cc: Jack Steiner <steiner@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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);


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