[Patch 4/4] memblock: compare current_limit with end variable at memblock_find_in_range_node()

[Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>]

memblock_find_in_range_node() does not compare memblock.current_limit
with end variable. Thus even if memblock.current_limit is smaller than
end variable, the function allocates memory address that is bigger than
memblock.current_limit.

The patch adds the check to "memblock_find_in_range_node()"

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
---
  mm/memblock.c |    5 +++--
  1 file changed, 3 insertions(+), 2 deletions(-)

Index: linux-3.4-rc6/mm/memblock.c
===================================================================
--- linux-3.4-rc6.orig/mm/memblock.c	2012-05-15 03:51:25.104153055 +0900
+++ linux-3.4-rc6/mm/memblock.c	2012-05-15 04:16:49.468094485 +0900
@@ -97,11 +97,12 @@ phys_addr_t __init_memblock memblock_fin
  					phys_addr_t align, int nid)
  {
  	phys_addr_t this_start, this_end, cand;
+	phys_addr_t current_limit = memblock.current_limit;
  	u64 i;

  	/* pump up @end */
-	if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
-		end = memblock.current_limit;
+	if ((end == MEMBLOCK_ALLOC_ACCESSIBLE) || (end > current_limit))
+		end = current_limit;

  	/* avoid allocating the first page */
  	start = max_t(phys_addr_t, start, PAGE_SIZE);

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>