[PATCH AUTOSEL 4.14 055/103] sched/debug: Use symbolic names for task state constants

Sasha Levin
2019-11-08T11:44:35Z

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

[ Upstream commit ff28915fd31ccafc0d38e6f84b66df280ed9e86a ]

include/trace/events/sched.h includes <linux/sched.h> (via
<linux/sched/numa_balancing.h>) and so knows about the TASK_* constants
used to interpret .prev_state. So instead of duplicating the magic
numbers make use of the defined macros to ease understanding the
mapping from state bits to letters which isn't completely intuitive for
an outsider.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel@pengutronix.de
Link: http://lkml.kernel.org/r/20180905093636.24068-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/trace/events/sched.h | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 6e692a52936c7..18197e0bb5108 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -169,9 +169,14 @@ TRACE_EVENT(sched_switch,

(__entry->prev_state & (TASK_REPORT_MAX - 1)) ?
__print_flags(__entry->prev_state & (TASK_REPORT_MAX - 1), "|",
- { 0x01, "S" }, { 0x02, "D" }, { 0x04, "T" },
- { 0x08, "t" }, { 0x10, "X" }, { 0x20, "Z" },
- { 0x40, "P" }, { 0x80, "I" }) :
+ { TASK_INTERRUPTIBLE, "S" },
+ { TASK_UNINTERRUPTIBLE, "D" },
+ { __TASK_STOPPED, "T" },
+ { __TASK_TRACED, "t" },
+ { EXIT_DEAD, "X" },
+ { EXIT_ZOMBIE, "Z" },
+ { TASK_PARKED, "P" },
+ { TASK_DEAD, "I" }) :
"R",

__entry->prev_state & TASK_REPORT_MAX ? "+" : "",
--
2.20.1