Explicitly convert type to double to avoid losing precision

Division between integers will also be integer.
Thus, to preserve fractional part explicitly
convert first operand to double.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 28d54aab05 ("examples: Introduce domtop")
Signed-off-by: Egor Makrushin <emakrushin@astralinux.ru>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>

diff --git a/examples/c/domain/domtop.c b/examples/c/domain/domtop.c
index dd35ec8661df264d481a05b9ea67708c4e1bf5e2..65663a1c392b95a8031da6196972828578cb8545 100644 (file)
--- a/examples/c/domain/domtop.c
+++ b/examples/c/domain/domtop.c
@@ -224,7 +224,7 @@ print_cpu_usage(size_t cpu,
          * performed has a bad effect on the precision, so instead of dividing
          * @now_params and @then_params by 1000 and then multiplying again by
          * 100, we divide only once by 10 and get the same result. */
-        usage = (now_params[pos].value.ul - then_params[pos].value.ul) /
+        usage = (double)(now_params[pos].value.ul - then_params[pos].value.ul) /
                 (now - then) / 10;
 
         if (delim)