From 4f42e465cb060115e967f8097d9b63aaf65d08e4 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Fri, 30 Oct 2015 15:34:55 +0100
Subject: [PATCH] btrfs-progs: image: fix bogus check after cpu on-line
 detection

Comparing unsigned type for <= 0 does not make much sense, we should
really check the signed value returned by sysconf.

Resolves-coverity-id: 1324536
Signed-off-by: David Sterba <dsterba@suse.com>
---
 btrfs-image.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/btrfs-image.c b/btrfs-image.c
index 20396ef7..d1d3d078 100644
--- a/btrfs-image.c
+++ b/btrfs-image.c
@@ -2787,9 +2787,11 @@ int main(int argc, char *argv[])
 
 	if (compress_level > 0 || create == 0) {
 		if (num_threads == 0) {
-			num_threads = sysconf(_SC_NPROCESSORS_ONLN);
-			if (num_threads <= 0)
-				num_threads = 1;
+			long tmp = sysconf(_SC_NPROCESSORS_ONLN);
+
+			if (tmp <= 0)
+				tmp = 1;
+			num_threads = tmp;
 		}
 	} else {
 		num_threads = 0;