watchdog: xen: use time64_t for timeouts

The Xen watchdog driver uses __kernel_time_t and ktime_to_timespec()
internally for managing its timeouts. Both are deprecated because of
y2038 problems. The driver itself is fine, since it only uses monotonic
times, but converting it to use ktime_get_seconds() avoids the deprecated
interfaces and is slightly simpler.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/xen_wdt.c b/drivers/watchdog/xen_wdt.c
index cf0e650..5dd5c34 100644 (file)
--- a/drivers/watchdog/xen_wdt.c
+++ b/drivers/watchdog/xen_wdt.c
@@ -35,7 +35,7 @@
 static struct platform_device *platform_device;
 static DEFINE_SPINLOCK(wdt_lock);
 static struct sched_watchdog wdt;
-static __kernel_time_t wdt_expires;
+static time64_t wdt_expires;
 static bool is_active, expect_release;
 
 #define WATCHDOG_TIMEOUT 60 /* in seconds */
@@ -49,15 +49,15 @@ module_param(nowayout, bool, S_IRUGO);
 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
        "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
-static inline __kernel_time_t set_timeout(void)
+static inline time64_t set_timeout(void)
 {
        wdt.timeout = timeout;
-       return ktime_to_timespec(ktime_get()).tv_sec + timeout;
+       return ktime_get_seconds() + timeout;
 }
 
 static int xen_wdt_start(void)
 {
-       __kernel_time_t expires;
+       time64_t expires;
        int err;
 
        spin_lock(&wdt_lock);
@@ -98,7 +98,7 @@ static int xen_wdt_stop(void)
 
 static int xen_wdt_kick(void)
 {
-       __kernel_time_t expires;
+       time64_t expires;
        int err;
 
        spin_lock(&wdt_lock);
@@ -222,7 +222,7 @@ static long xen_wdt_ioctl(struct file *file, unsigned int cmd,
                return put_user(timeout, argp);
 
        case WDIOC_GETTIMELEFT:
-               retval = wdt_expires - ktime_to_timespec(ktime_get()).tv_sec;
+               retval = wdt_expires - ktime_get_seconds();
                return put_user(retval, argp);
        }