y2038: ipc: Use ktime_get_real_seconds consistently

y2038: ipc: Use ktime_get_real_seconds consistently

[ Upstream commit 2a70b7879b84d471fd0e440f027bba310e0c1fb7 ]

In some places, we still used get_seconds() instead of
ktime_get_real_seconds(), and I'm changing the remaining ones now to
all use ktime_get_real_seconds() so we use the full available range for
timestamps instead of overflowing the 'unsigned long' return value in
year 2106 on 32-bit kernels.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>