time/timecounter: Mark 1st argument of timecounter_cyc2time() as const

The timecounter is not modified in this function. Mark it as const.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210303103544.994855-1-mkl@pengutronix.de

diff --git a/include/linux/timecounter.h b/include/linux/timecounter.h
index 754b74a2167feb7f1b12430882e7ad02faaa198e..c6540ceea14303151317627d3216d9f86a549341 100644 (file)
--- a/include/linux/timecounter.h
+++ b/include/linux/timecounter.h
@@ -124,7 +124,7 @@ extern u64 timecounter_read(struct timecounter *tc);
  * This allows conversion of cycle counter values which were generated
  * in the past.
  */
-extern u64 timecounter_cyc2time(struct timecounter *tc,
+extern u64 timecounter_cyc2time(const struct timecounter *tc,
                                u64 cycle_tstamp);
 
 #endif

diff --git a/kernel/time/timecounter.c b/kernel/time/timecounter.c
index 85b98e727306f1ecec22076d0a397109dbe60c82..e6285288d76572d192435a1a44babc57bfda8770 100644 (file)
--- a/kernel/time/timecounter.c
+++ b/kernel/time/timecounter.c
@@ -76,7 +76,7 @@ static u64 cc_cyc2ns_backwards(const struct cyclecounter *cc,
        return ns;
 }
 
-u64 timecounter_cyc2time(struct timecounter *tc,
+u64 timecounter_cyc2time(const struct timecounter *tc,
                         u64 cycle_tstamp)
 {
        u64 delta = (cycle_tstamp - tc->cycle_last) & tc->cc->mask;