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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>
This commit is contained in:
Arnd Bergmann 2018-06-18 16:16:26 +02:00 committed by Greg Kroah-Hartman
parent fb7f1bf8d0
commit c884f871fb
1 changed files with 5 additions and 14 deletions
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19
drivers/tty/tty_io.c
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@ -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: