sched/debug: Fix potential call to __ffs(0) in sched_show_task()

[cascardo/linux.git] / kernel / sched / core.c

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 56c9b79..816c172 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4508,9 +4508,10 @@ void sched_show_task(struct task_struct *p)
 {
        unsigned long free = 0;
        int ppid;
-       unsigned state;
+       unsigned long state = p->state;
 
-       state = p->state ? __ffs(p->state) + 1 : 0;
+       if (state)
+               state = __ffs(state) + 1;
        printk(KERN_INFO "%-15.15s %c", p->comm,
                state < sizeof(stat_nam) - 1 ? stat_nam[state] : '?');
 #if BITS_PER_LONG == 32