linux-kernel - [PATCH] firewire: use 64-bit time

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Message-Id: <20180618153334.1963539-1-arnd@arndb.de>
Date:   Mon, 18 Jun 2018 17:33:26 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Stefan Richter <stefanr@...6.in-berlin.de>
Cc:     y2038@...ts.linaro.org, Arnd Bergmann <arnd@...db.de>,
        linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] firewire: use 64-bit time_t based interfaces

32-bit CLOCK_REALTIME timestamps overflow in year 2038, so all such interfaces
are deprecated now. For the FW_CDEV_IOC_GET_CYCLE_TIMER2 ioctl, we already
support 64-bit timestamps, but the implementation still uses timespec.

This changes the code to use timespec64 instead with the appropriate
accessor functions.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/firewire/core-cdev.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index f0587273940e..d8e185582642 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -1205,7 +1205,7 @@ static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
 {
 	struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
 	struct fw_card *card = client->device->card;
-	struct timespec ts = {0, 0};
+	struct timespec64 ts = {0, 0};
 	u32 cycle_time;
 	int ret = 0;
 
@@ -1214,9 +1214,9 @@ static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
 	cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
 
 	switch (a->clk_id) {
-	case CLOCK_REALTIME:      getnstimeofday(&ts);	break;
-	case CLOCK_MONOTONIC:     ktime_get_ts(&ts);	break;
-	case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts);	break;
+	case CLOCK_REALTIME:      ktime_get_real_ts64(&ts);	break;
+	case CLOCK_MONOTONIC:     ktime_get_ts64(&ts);		break;
+	case CLOCK_MONOTONIC_RAW: ktime_get_raw_ts64(&ts);	break;
 	default:
 		ret = -EINVAL;
 	}
-- 
2.9.0