linux/drivers/pps
Thomas Gleixner 95b90afec3 pps: make pps_gen_parport depend on BROKEN
This driver causes hard lockups, when the active clock soure is jiffies.

The reason is that it loops with interrupts disabled waiting for a
timestamp to be reached by polling getnstimeofday().  Though with a
jiffies clocksource, when that code runs on the same CPU which is
responsible for updating jiffies, then we loop in circles for ever
simply because the timer interrupt cannot update jiffies.  So both UP
and SMP can be affected.

There is no easy fix for that problem so make it depend on BROKEN for
now.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-04 17:53:38 -08:00
..
clients pps: claim parallel port exclusively 2011-01-26 10:50:00 +10:00
generators pps: make pps_gen_parport depend on BROKEN 2011-03-04 17:53:38 -08:00
Kconfig pps: add parallel port PPS signal generator 2011-01-13 08:03:21 -08:00
Makefile pps: add parallel port PPS signal generator 2011-01-13 08:03:21 -08:00
kapi.c pps: initialize ts_real properly 2011-02-25 15:07:37 -08:00
kc.c pps: add kernel consumer support 2011-01-13 08:03:21 -08:00
kc.h pps: add kernel consumer support 2011-01-13 08:03:21 -08:00
pps.c pps: add kernel consumer support 2011-01-13 08:03:21 -08:00
sysfs.c LinuxPPS: core support 2009-06-18 13:04:04 -07:00