[PATCH v1 1/5] tick/nohz: Improve tick_nohz_get_next_hrtimer() kerneldoc

From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Frederic Weisbecker <frederic@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"Zhou Ti (x2019cwm)" <x2019cwm@stfx.ca>
Subject: [PATCH v1 1/5] tick/nohz: Improve tick_nohz_get_next_hrtimer() kerneldoc
Date: Mon, 29 Mar 2021 20:13:37 +0200	[thread overview]
Message-ID: <3104403.44csPzL39Z@kreacher> (raw)
In-Reply-To: <2764850.e9J7NaK4W3@kreacher>

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

Make the tick_nohz_get_next_hrtimer() kerneldoc comment state clearly
that the function may return negative numbers.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 kernel/time/tick-sched.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Index: linux-pm/kernel/time/tick-sched.c
===================================================================

--- linux-pm.orig/kernel/time/tick-sched.c
+++ linux-pm/kernel/time/tick-sched.c
@@ -1124,7 +1124,11 @@ ktime_t tick_nohz_get_next_hrtimer(void)
  * tick_nohz_get_sleep_length - return the expected length of the current sleep
  * @delta_next: duration until the next event if the tick cannot be stopped
  *
- * Called from power state control code with interrupts disabled
+ * Called from power state control code with interrupts disabled.
+ *
+ * The return value of this function and/or the value returned by it through the
+ * @delta_next pointer can be negative which must be taken into account by its
+ * callers.
  */
 ktime_t tick_nohz_get_sleep_length(ktime_t *delta_next)
 {



