[tip: timers/core] time: Rename tsk->real_start_time to ->start_boottime

[tip-bot2 for Peter Zijlstra]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     cf25e24db61cc9df42c47485a2ec2bff4e9a3692
Gitweb:        https://git.kernel.org/tip/cf25e24db61cc9df42c47485a2ec2bff4e9a3692
Author:        Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate:    Thu, 07 Nov 2019 11:07:58 +01:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Wed, 13 Nov 2019 11:09:49 +01:00

time: Rename tsk->real_start_time to ->start_boottime

Since it stores CLOCK_BOOTTIME, not, as the name suggests,
CLOCK_REALTIME, let's rename ->real_start_time to ->start_bootime.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 fs/exec.c             | 2 +-
 fs/proc/array.c       | 2 +-
 include/linux/sched.h | 2 +-
 kernel/fork.c         | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 555e93c..f4d0f3a 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1132,7 +1132,7 @@ static int de_thread(struct task_struct *tsk)
 		 * also take its birthdate (always earlier than our own).
 		 */
 		tsk->start_time = leader->start_time;
-		tsk->real_start_time = leader->real_start_time;
+		tsk->start_boottime = leader->start_boottime;
 
 		BUG_ON(!same_thread_group(leader, tsk));
 		BUG_ON(has_group_leader_pid(tsk));
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 46dcb6f..5efaf37 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -533,7 +533,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
 	nice = task_nice(task);
 
 	/* convert nsec -> ticks */
-	start_time = nsec_to_clock_t(task->real_start_time);
+	start_time = nsec_to_clock_t(task->start_boottime);
 
 	seq_put_decimal_ull(m, "", pid_nr_ns(pid, ns));
 	seq_puts(m, " (");
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 67a1d86..2541289 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -857,7 +857,7 @@ struct task_struct {
 	u64				start_time;
 
 	/* Boot based time in nsecs: */
-	u64				real_start_time;
+	u64				start_boottime;
 
 	/* MM fault and swap info: this can arguably be seen as either mm-specific or thread-specific: */
 	unsigned long			min_flt;
diff --git a/kernel/fork.c b/kernel/fork.c
index bcdf531..1392ee8 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2130,7 +2130,7 @@ static __latent_entropy struct task_struct *copy_process(
 	 */
 
 	p->start_time = ktime_get_ns();
-	p->real_start_time = ktime_get_boottime_ns();
+	p->start_boottime = ktime_get_boottime_ns();
 
 	/*
 	 * Make it visible to the rest of the system, but dont wake it up yet.