[tip: timers/core] time/timecounter: Mark 1st argument of timecounter_cyc2time() as const

[tip-bot2 for Marc Kleine-Budde]

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

Commit-ID:     07ff4aed015c564d03fd518d2fb54e5e6948903c
Gitweb:        https://git.kernel.org/tip/07ff4aed015c564d03fd518d2fb54e5e6948903c
Author:        Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
AuthorDate:    Wed, 03 Mar 2021 11:35:44 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Fri, 16 Apr 2021 21:03:50 +02:00

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@xxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210303103544.994855-1-mkl@xxxxxxxxxxxxxx

---
 include/linux/timecounter.h | 2 +-
 kernel/time/timecounter.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/timecounter.h b/include/linux/timecounter.h
index 754b74a..c6540ce 100644
--- 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 85b98e7..e628528 100644
--- 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;