+ pps-add-parallel-port-pps-signal-generator-v7.patch added to -mm tree

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The patch titled
     pps: add parallel port PPS signal generator
has been added to the -mm tree.  Its filename is
     pps-add-parallel-port-pps-signal-generator-v7.patch

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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: pps: add parallel port PPS signal generator
From: Alexander Gordeev <lasaine@xxxxxxxxxxxxx>

Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals.  It uses parport abstraction layer and hrtimers to
precisely control the signal.

Signed-off-by: Alexander Gordeev <lasaine@xxxxxxxxxxxxx>
Cc: Rodolfo Giometti <giometti@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 drivers/pps/generators/Kconfig           |    6 +-----
 drivers/pps/generators/pps_gen_parport.c |   11 +++++++++--
 2 files changed, 10 insertions(+), 7 deletions(-)

diff -puN drivers/pps/generators/Kconfig~pps-add-parallel-port-pps-signal-generator-v7 drivers/pps/generators/Kconfig
--- a/drivers/pps/generators/Kconfig~pps-add-parallel-port-pps-signal-generator-v7
+++ a/drivers/pps/generators/Kconfig
@@ -2,16 +2,12 @@
 # PPS generators configuration
 #
 
-if PPS
-
 comment "PPS generators support"
 
 config PPS_GENERATOR_PARPORT
 	tristate "Parallel port PPS signal generator"
-	depends on PARPORT != n && GENERIC_TIME
+	depends on PARPORT
 	help
 	  If you say yes here you get support for a PPS signal generator which
 	  utilizes STROBE pin of a parallel port to send PPS signals. It uses
 	  parport abstraction layer and hrtimers to precisely control the signal.
-
-endif
diff -puN drivers/pps/generators/pps_gen_parport.c~pps-add-parallel-port-pps-signal-generator-v7 drivers/pps/generators/pps_gen_parport.c
--- a/drivers/pps/generators/pps_gen_parport.c~pps-add-parallel-port-pps-signal-generator-v7
+++ a/drivers/pps/generators/pps_gen_parport.c
@@ -76,8 +76,15 @@ static enum hrtimer_restart hrtimer_even
 	long lim, delta;
 	unsigned long flags;
 
-	/* NB: approx time with blocked interrupts =
-	   send_delay + 3 * SAFETY_INTERVAL */
+	/* We have to disable interrupts here. The idea is to prevent
+	 * other interrupts on the same processor to introduce random
+	 * lags while polling the clock. getnstimeofday() takes <1us on
+	 * most machines while other interrupt handlers can take much
+	 * more potentially.
+	 *
+	 * NB: approx time with blocked interrupts =
+	 * send_delay + 3 * SAFETY_INTERVAL
+	 */
 	local_irq_save(flags);
 
 	/* first of all we get the time stamp... */
_

Patches currently in -mm which might be from lasaine@xxxxxxxxxxxxx are

pps-trivial-fixes.patch
pps-declare-variables-where-they-are-used-in-switch.patch
pps-fix-race-in-pps_fetch-handler.patch
pps-unify-timestamp-gathering.patch
pps-access-pps-device-by-direct-pointer.patch
pps-convert-printk-pr_-to-dev_.patch
pps-move-idr-stuff-to-ppsc.patch
pps-make-idr-lock-a-mutex-and-protect-idr_pre_get.patch
pps-use-bug_on-for-kernel-api-safety-checks.patch
pps-simplify-conditions-a-bit.patch
pps-timestamp-is-always-passed-to-dcd_change.patch
ntp-add-hardpps-implementation.patch
ntp-add-hardpps-implementation-update-v7.patch
pps-capture-monotonic_raw-timestamps-as-well.patch
pps-capture-monotonic_raw-timestamps-as-well-v7.patch
pps-add-kernel-consumer-support.patch
pps-add-kernel-consumer-support-v7.patch
pps-add-parallel-port-pps-client.patch
pps-add-parallel-port-pps-client-v7.patch
pps-add-parallel-port-pps-signal-generator.patch
pps-add-parallel-port-pps-signal-generator-v7.patch

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