Merge libata upstream (which includes C/H/S support) include irq-pio branch.

Merge branch 'upstream'

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 49e617fa0f66..c3ba31f210a9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -107,13 +107,25 @@ extern unsigned long nr_iowait(void);
 
 #include <asm/processor.h>
 
+/*
+ * Task state bitmask. NOTE! These bits are also
+ * encoded in fs/proc/array.c: get_task_state().
+ *
+ * We have two separate sets of flags: task->state
+ * is about runnability, while task->exit_state are
+ * about the task exiting. Confusing, but this way
+ * modifying one set can't modify the other one by
+ * mistake.
+ */
 #define TASK_RUNNING            0
 #define TASK_INTERRUPTIBLE      1
 #define TASK_UNINTERRUPTIBLE    2
 #define TASK_STOPPED            4
 #define TASK_TRACED             8
+/* in tsk->exit_state */
 #define EXIT_ZOMBIE             16
 #define EXIT_DEAD               32
+/* in tsk->state again */
 #define TASK_NONINTERACTIVE     64
 
 #define __set_task_state(tsk, state_value)              \