tty: use 64-bit timstamp

The automated VFS conversion to timespec64 has left one caller of
the deprecated get_seconds() function in the tty driver, this cleans
it up to call ktime_get_real_seconds() instead, fixing the possible
overflow.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index aba5952..11c2df9 100644 (file)
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -814,9 +814,9 @@ void start_tty(struct tty_struct *tty)
 }
 EXPORT_SYMBOL(start_tty);
 
-static void tty_update_time(struct timespec *time)
+static void tty_update_time(struct timespec64 *time)
 {
-       unsigned long sec = get_seconds();
+       time64_t sec = ktime_get_real_seconds();
 
        /*
         * We only care if the two values differ in anything other than the
@@ -867,13 +867,8 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
                i = -EIO;
        tty_ldisc_deref(ld);
 
-       if (i > 0) {
-               struct timespec ts;
-
-               ts = timespec64_to_timespec(inode->i_atime);
-               tty_update_time(&ts);
-               inode->i_atime = timespec_to_timespec64(ts);
-       }
+       if (i > 0)
+               tty_update_time(&inode->i_atime);
 
        return i;
 }
@@ -974,11 +969,7 @@ static inline ssize_t do_tty_write(
                cond_resched();
        }
        if (written) {
-               struct timespec ts;
-
-               ts = timespec64_to_timespec(file_inode(file)->i_mtime);
-               tty_update_time(&ts);
-               file_inode(file)->i_mtime = timespec_to_timespec64(ts);
+               tty_update_time(&file_inode(file)->i_mtime);
                ret = written;
        }
 out: