George Spelvin 513b032c98
pps: Add pps_lookup_dev() function ...
The PPS serial line discipline wants to attach a PPS device to a tty
without changing the tty code to add a struct pps_device * pointer.
Since the number of PPS devices in a typical system is generally very low
(n=1 is by far the most common), it's practical to search the entire list
of allocated pps devices. (We capture the timestamp before the lookup,
so the timing isn't affected.)
It is a bit ugly that this function, which is part of the in-kernel
PPS API, has to be in pps.c as opposed to kapi,c, but that's not
something that affects users.
Signed-off-by: George Spelvin <linux@horizon.com >
Acked-by: Rodolfo Giometti <giometti@enneenne.com >
Cc: stable <stable@vger.kernel.org >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
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513b032c98