From: Eric Sandeen <sandeen@redhat.com>
Date: Fri, 16 Dec 2011 19:25:16 +0000 (-0600)
Subject: blkparse: initialize cpu_map
X-Git-Tag: blktrace-1.0.5~5
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=cd992d08dae8dca9f46f75506ec9ceb204dc2f39;p=blktrace.git

blkparse: initialize cpu_map

We malloc'd cpu_map, and then did:

	cpu_map[CPU_IDX(cpu)] |= (1UL << CPU_BIT(cpu));

... not sure how that ever worked if cpu_map was not initialized!

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---

diff --git a/blkparse.c b/blkparse.c
index 0f8d135..80b3a71 100644
--- a/blkparse.c
+++ b/blkparse.c
@@ -1962,6 +1962,7 @@ static int check_cpu_map(struct per_dev_info *pdi)
 	 * create a map of the cpus we have traces for
 	 */
 	cpu_map = malloc(pdi->cpu_map_max / sizeof(long));
+	memset(cpu_map, 0, sizeof(*cpu_map));
 	n = rb_first(&rb_sort_root);
 	while (n) {
 		__t = rb_entry(n, struct trace, rb_node);