From: Nicolas Pitre <nicolas.pitre@linaro.org>
To: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Richard Cochran <richardcochran@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/2] make POSIX timers optional
Date: Tue, 20 Sep 2016 15:56:38 -0400 [thread overview]
Message-ID: <1474401400-18491-1-git-send-email-nicolas.pitre@linaro.org> (raw)
Many embedded systems don't need the full POSIX timer support.
Configuring them out provides a nice kernel image size reduction.
When POSIX timers are configured out, the PTP clock subsystem should be
left out as well. However a bunch of ethernet drivers currently *select*
it in their Kconfig entries. Therefore some more tweaks were needed to
break that hard dependency for those drivers to still be configured in
if desired.
It was agreed that the best path upstream for those patches is via
John Stultz's timer tree.
Previous itterations of those patches and the discussion threads can be
found here:
https://lkml.org/lkml/2016/9/14/992
https://lkml.org/lkml/2016/9/14/803
https://lkml.org/lkml/2016/9/8/793
Changes from v1:
- Add a warning for the case where PTP clock subsystem is modular and a
driver providing a clock is built-in rather than silently ignoring it.
Suggested by Jiri Benc.
- Added Eugenia Emantayev's reviewed-by tag.
diffstat:
drivers/Makefile | 2 +-
drivers/net/ethernet/adi/Kconfig | 8 +-
drivers/net/ethernet/amd/Kconfig | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-main.c | 6 +-
drivers/net/ethernet/broadcom/Kconfig | 4 +-
drivers/net/ethernet/cavium/Kconfig | 2 +-
drivers/net/ethernet/freescale/Kconfig | 2 +-
drivers/net/ethernet/intel/Kconfig | 10 +-
drivers/net/ethernet/intel/e1000e/ptp.c | 2 +-
drivers/net/ethernet/intel/i40e/i40e_ptp.c | 2 +-
drivers/net/ethernet/intel/igb/igb_ptp.c | 2 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/Kconfig | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 2 +-
drivers/net/ethernet/mellanox/mlx5/core/Kconfig | 2 +-
.../net/ethernet/mellanox/mlx5/core/en_clock.c | 2 +-
drivers/net/ethernet/renesas/Kconfig | 2 +-
drivers/net/ethernet/samsung/Kconfig | 2 +-
drivers/net/ethernet/sfc/Kconfig | 2 +-
drivers/net/ethernet/sfc/ptp.c | 14 +--
drivers/net/ethernet/stmicro/stmmac/Kconfig | 2 +-
.../net/ethernet/stmicro/stmmac/stmmac_ptp.c | 2 +-
drivers/net/ethernet/ti/Kconfig | 2 +-
drivers/net/ethernet/tile/Kconfig | 2 +-
drivers/ptp/Kconfig | 14 ++-
include/linux/posix-timers.h | 28 ++++-
include/linux/ptp_clock_kernel.h | 64 +++++++---
include/linux/sched.h | 10 ++
init/Kconfig | 17 +++
kernel/signal.c | 4 +
kernel/time/Kconfig | 1 +
kernel/time/Makefile | 10 +-
kernel/time/posix-stubs.c | 118 ++++++++++++++++++
33 files changed, 282 insertions(+), 64 deletions(-)
next reply other threads:[~2016-09-20 19:56 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-20 19:56 Nicolas Pitre [this message]
2016-09-20 19:56 ` [PATCH 1/2] ptp_clock: allow for it to be optional Nicolas Pitre
2016-09-20 19:56 ` [PATCH 2/2] posix-timers: make it configurable Nicolas Pitre
2016-09-20 20:25 ` [PATCH v2 0/2] make POSIX timers optional Richard Cochran
2016-09-20 20:45 ` Richard Cochran
2016-09-20 20:58 ` Nicolas Pitre
2016-09-20 21:09 ` Thomas Gleixner
2016-09-20 22:47 ` Nicolas Pitre
2016-09-21 8:38 ` Richard Cochran
2016-09-21 10:27 ` Jiri Benc
2016-09-21 9:09 ` Thomas Gleixner
2016-09-21 10:20 ` Jiri Benc
2016-09-20 20:52 ` Nicolas Pitre
2016-09-22 6:09 ` David Miller
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