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Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h26
1 files changed, 19 insertions, 7 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 92fb8dd5a9e4..163a0b738908 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1243,17 +1243,29 @@ static inline pid_t task_pgrp_nr(struct task_struct *tsk)
return task_pgrp_nr_ns(tsk, &init_pid_ns);
}
-static inline char task_state_to_char(struct task_struct *task)
+static inline unsigned int __get_task_state(struct task_struct *tsk)
{
- const char stat_nam[] = TASK_STATE_TO_CHAR_STR;
- unsigned long state = task->state;
+ unsigned int tsk_state = READ_ONCE(tsk->state);
+ unsigned int state = (tsk_state | tsk->exit_state) & TASK_REPORT;
- state = state ? __ffs(state) + 1 : 0;
+ if (tsk_state == TASK_PARKED)
+ state = TASK_INTERRUPTIBLE;
- /* Make sure the string lines up properly with the number of task states: */
- BUILD_BUG_ON(sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1);
+ return fls(state);
+}
+
+static inline char __task_state_to_char(unsigned int state)
+{
+ static const char state_char[] = "RSDTtXZ";
+
+ BUILD_BUG_ON(1 + ilog2(TASK_REPORT) != sizeof(state_char) - 2);
- return state < sizeof(stat_nam) - 1 ? stat_nam[state] : '?';
+ return state_char[state];
+}
+
+static inline char task_state_to_char(struct task_struct *tsk)
+{
+ return __task_state_to_char(__get_task_state(tsk));
}
/**