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| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-12-14 12:33:31 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-12-14 12:33:31 +0100 |
| commit | bb22dc14a2c29f6efef40ee72344c5d283a92987 (patch) | |
| tree | 90938fc65a1c67ce3afbf3ccae7f10250a696332 /include/trace/events/sched.h | |
| parent | fca91f6d60b6ee53b8d43c8ad5bad153a758961c (diff) | |
| parent | 211929fd3f7c8de4d541b1cc243b82830e5ea1e8 (diff) | |
Merge branch 'khdr_fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest into HEAD
Merge topic branch from Shuah.
Diffstat (limited to 'include/trace/events/sched.h')
| -rw-r--r-- | include/trace/events/sched.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index f07b270d4fc4..9a4bdfadab07 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -107,6 +107,8 @@ DEFINE_EVENT(sched_wakeup_template, sched_wakeup_new, #ifdef CREATE_TRACE_POINTS static inline long __trace_sched_switch_state(bool preempt, struct task_struct *p) { + unsigned int state; + #ifdef CONFIG_SCHED_DEBUG BUG_ON(p != current); #endif /* CONFIG_SCHED_DEBUG */ @@ -118,7 +120,15 @@ static inline long __trace_sched_switch_state(bool preempt, struct task_struct * if (preempt) return TASK_REPORT_MAX; - return 1 << task_state_index(p); + /* + * task_state_index() uses fls() and returns a value from 0-8 range. + * Decrement it by 1 (except TASK_RUNNING state i.e 0) before using + * it for left shift operation to get the correct task->state + * mapping. + */ + state = task_state_index(p); + + return state ? (1 << (state - 1)) : state; } #endif /* CREATE_TRACE_POINTS */ |