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From: Arnd Bergmann <arnd@arndb.de>
To: Thomas Gleixner <tglx@linutronix.de>,
	John Stultz <john.stultz@linaro.org>
Cc: y2038@lists.linaro.org, Arnd Bergmann <arnd@arndb.de>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] timer: avoid using timespec
Date: Fri, 17 Jun 2016 17:30:47 +0200	[thread overview]
Message-ID: <20160617153056.344585-1-arnd@arndb.de> (raw)

The tstats_show() function prints a ktime_t variable by converting
it to struct timespec first. The algorithm is ok, but we want to
stop using timespec in general because of the 32-bit time_t
overflow problem.

This changes the code to use struct timespec64, without any
functional change.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 kernel/time/timer_stats.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 1adecb4b87c8..087204c733eb 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -279,7 +279,7 @@ static void print_name_offset(struct seq_file *m, unsigned long addr)
 
 static int tstats_show(struct seq_file *m, void *v)
 {
-	struct timespec period;
+	struct timespec64 period;
 	struct entry *entry;
 	unsigned long ms;
 	long events = 0;
@@ -295,11 +295,11 @@ static int tstats_show(struct seq_file *m, void *v)
 
 	time = ktime_sub(time_stop, time_start);
 
-	period = ktime_to_timespec(time);
+	period = ktime_to_timespec64(time);
 	ms = period.tv_nsec / 1000000;
 
 	seq_puts(m, "Timer Stats Version: v0.3\n");
-	seq_printf(m, "Sample period: %ld.%03ld s\n", period.tv_sec, ms);
+	seq_printf(m, "Sample period: %ld.%03ld s\n", (long)period.tv_sec, ms);
 	if (atomic_read(&overflow_count))
 		seq_printf(m, "Overflow: %d entries\n", atomic_read(&overflow_count));
 	seq_printf(m, "Collection: %s\n", timer_stats_active ? "active" : "inactive");
-- 
2.9.0

             reply	other threads:[~2016-06-17 15:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-17 15:30 Arnd Bergmann [this message]
2016-06-17 20:50 ` John Stultz

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