bugfix: avoid underflow in budget_remaining()

budget_remaining() reports incorrect values due to the operands being
switched, which leads to an integer underflow.

Reported-by: Chris Kenna <cjk@cs.unc.edu>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/litmus/litmus.h b/include/litmus/litmus.h
index 5d20276e44f4..867239875eef 100644
--- a/include/litmus/litmus.h
+++ b/include/litmus/litmus.h
@@ -88,7 +88,7 @@ inline static int budget_exhausted(struct task_struct* t)
 inline static lt_t budget_remaining(struct task_struct* t)
 {
         if (!budget_exhausted(t))
-                return get_exec_time(t) - get_exec_cost(t);
+                return get_exec_cost(t) - get_exec_time(t);
         else
                 /* avoid overflow */
                 return 0;