[PATCH] makedumpfile: fix missing count of filtered free pages

[HATAYAMA Daisuke]

On the current implementation, __exclude_unnecessary_pages() can refer
to page frames not belonging to current cycle. Thus, pfn_free can be
now counted up even if it doesn't belong to the current cycle.

This patch changes it so pfn_free is counted up only if the
corresponding pfn really belongs to the cycle.

Signed-off-by: HATAYAMA Daisuke <d.hatayama at jp.fujitsu.com>
---
 makedumpfile.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/makedumpfile.c b/makedumpfile.c
index acb1b21..817da34 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -4224,9 +4224,9 @@ __exclude_unnecessary_pages(unsigned long mem_map,
 				 * See check_cyclic_buffer_overrun()
 				 * for the detail.
 				 */
-				clear_bit_on_2nd_bitmap_for_kernel(pfn + i);
+				if (clear_bit_on_2nd_bitmap_for_kernel(pfn + i))
+					pfn_free++;
 			}
-			pfn_free += i;
 		}
 		/*
 		 * Exclude the cache page without the private page.
-- 
1.7.7.6