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Date: Mon, 27 Oct 2014 13:44:46 +0800
From: "pang.xunlei" <pang.xunlei@...aro.org>
To: linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com
Cc: John Stultz <john.stultz@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Alessandro Zummo <a.zummo@...ertech.it>,
"pang.xunlei" <pang.xunlei@...aro.org>
Subject: [PATCH RFC 00/12] time: Convert do_settimeofday() to use timespec64
The kernel uses 32-bit signed value(time_t) for seconds since 1970-01-01:00:00:00, so it
will overflow at 2038-01-19 03:14:08 on 32-bit systems. We call this "2038 safety" issue.
This series doesn't involve any functional change, and mainly converts do_settimeofday()
to use timespec64. During the conversion, it needs to convert mktime(), rtc_tm_to_time(),
rtc_time_to_tm() and other functions similarly due to dependencies.
The main processing logic here is:
mktime:
*Rename mktime() to mktime_unsafe()
*Add mktime() safe version(using time64_t)
rtc_tm_to_time:
*Rename rtc_tm_to_time() to rtc_tm_to_time_unsafe()
*Add rtc_tm_to_time() safe version(using time64_t)
*Convert rtc_tm_to_time_unsafe() to rtc_tm_to_time() in rtc_hctosys()
rtc_time_to_tm:
*Rename rtc_time_to_tm() to rtc_time_to_tm_unsafe()
*Add rtc_time_to_tm() safe version(using time64_t)
*Convert rtc_time_to_tm_unsafe() to rtc_time_to_tm() in alarm_set_rtc()
do_settimeofday:
*Convert do_settimeofday() to use timespec64
*Convert xen_read_wallclock() to use timespec64
*Convert pvclock_read_wallclock() to use timespec64
Convert xxx_unsafe() to xxx():
*Convert mktime_unsafe() to mktime() one by one
*Convert rtc_tm_to_time_unsafe() to rtc_tm_to_time() one by one
*Convert rtc_time_to_tm_unsafe() to rtc_time_to_tm() one by one
*Try the best to eliminate TODOs brought by these patches
So the rest of this patch series does tons of work on these conversions.
NOTE: This series actually contains 157 patches in total, but just sent out a small subset
here for feedback to make sure there are no objections with my approach. Please access the
link below to see all the patches:
https://git.linaro.org/people/pang.xunlei/linuxstable.git
pang.xunlei (12):
time: Rename mktime() to mktime_unsafe()
time: Add mktime() safe version(using time64_t)
time: Rename rtc_tm_to_time() to rtc_tm_to_time_unsafe()
time: Add rtc_tm_to_time() safe version(using time64_t)
time: Convert rtc_tm_to_time_unsafe() to rtc_tm_to_time() in
rtc_hctosys()
time: Fix build warnings for time64_t to __kernel_time_t warning on
64-bit systems.
time: Rename rtc_time_to_tm() to rtc_time_to_tm_unsafe()
time: Add rtc_time_to_tm() safe version(using time64_t)
time: Convert rtc_time_to_tm_unsafe() to rtc_time_to_tm() in
alarm_set_rtc()
time: Convert do_settimeofday() to use timespec64
time: Convert xen_read_wallclock() to use timespec64
time: Convert pvclock_read_wallclock() to use timespec64
arch/avr32/kernel/time.c | 2 +-
arch/frv/kernel/time.c | 2 +-
arch/ia64/kernel/efi.c | 2 +-
arch/m32r/kernel/time.c | 2 +-
arch/m68k/kernel/time.c | 2 +-
arch/m68k/mac/misc.c | 2 +-
arch/mips/dec/time.c | 2 +-
arch/mips/include/asm/mc146818-time.h | 2 +-
arch/mips/sibyte/swarm/rtc_m41t81.c | 4 +--
arch/mips/sibyte/swarm/rtc_xicor1241.c | 4 +--
arch/mips/sibyte/swarm/setup.c | 2 +-
arch/mn10300/kernel/rtc.c | 4 +--
arch/parisc/include/asm/rtc.h | 2 +-
arch/powerpc/kernel/rtas-proc.c | 2 +-
arch/powerpc/kernel/rtas-rtc.c | 2 +-
arch/powerpc/kernel/time.c | 2 +-
arch/powerpc/platforms/8xx/m8xx_setup.c | 2 +-
arch/powerpc/platforms/cell/beat.c | 2 +-
arch/powerpc/platforms/maple/time.c | 2 +-
arch/powerpc/platforms/pasemi/time.c | 2 +-
arch/powerpc/platforms/powermac/time.c | 2 +-
arch/powerpc/platforms/powernv/opal-rtc.c | 2 +-
arch/sh/boards/mach-sh03/rtc.c | 2 +-
arch/sh/kernel/time.c | 6 ++--
arch/x86/include/asm/pvclock.h | 2 +-
arch/x86/kernel/kvmclock.c | 7 ++--
arch/x86/kernel/pvclock.c | 8 ++---
arch/x86/kernel/rtc.c | 4 +--
arch/x86/platform/efi/efi.c | 2 +-
arch/x86/platform/intel-mid/intel_mid_vrtc.c | 4 +--
arch/x86/xen/time.c | 17 ++++++---
drivers/hv/hv_util.c | 4 +--
drivers/power/charger-manager.c | 10 +++---
drivers/rtc/class.c | 4 +--
drivers/rtc/hctosys.c | 6 ++--
drivers/rtc/interface.c | 14 ++++----
drivers/rtc/rtc-88pm80x.c | 18 +++++-----
drivers/rtc/rtc-88pm860x.c | 18 +++++-----
drivers/rtc/rtc-ab3100.c | 6 ++--
drivers/rtc/rtc-ab8500.c | 14 ++++----
drivers/rtc/rtc-at32ap700x.c | 8 ++---
drivers/rtc/rtc-at91sam9.c | 8 ++---
drivers/rtc/rtc-au1xxx.c | 4 +--
drivers/rtc/rtc-bfin.c | 6 ++--
drivers/rtc/rtc-coh901331.c | 6 ++--
drivers/rtc/rtc-da9052.c | 4 +--
drivers/rtc/rtc-da9063.c | 4 +--
drivers/rtc/rtc-davinci.c | 6 ++--
drivers/rtc/rtc-dev.c | 6 ++--
drivers/rtc/rtc-dm355evm.c | 4 +--
drivers/rtc/rtc-ds1305.c | 4 +--
drivers/rtc/rtc-ds1374.c | 10 +++---
drivers/rtc/rtc-ds1511.c | 2 +-
drivers/rtc/rtc-ds1553.c | 2 +-
drivers/rtc/rtc-ds1672.c | 2 +-
drivers/rtc/rtc-ds2404.c | 2 +-
drivers/rtc/rtc-ep93xx.c | 2 +-
drivers/rtc/rtc-imxdi.c | 6 ++--
drivers/rtc/rtc-isl1208.c | 4 +--
drivers/rtc/rtc-jz4740.c | 6 ++--
drivers/rtc/rtc-lib.c | 37 ++++++++++++++-----
drivers/rtc/rtc-lpc32xx.c | 6 ++--
drivers/rtc/rtc-ls1x.c | 4 +--
drivers/rtc/rtc-mc13xxx.c | 6 ++--
drivers/rtc/rtc-mpc5121.c | 4 +--
drivers/rtc/rtc-mv.c | 2 +-
drivers/rtc/rtc-mxc.c | 12 +++----
drivers/rtc/rtc-pcap.c | 6 ++--
drivers/rtc/rtc-pl030.c | 8 ++---
drivers/rtc/rtc-pl031.c | 12 +++----
drivers/rtc/rtc-pm8xxx.c | 8 ++---
drivers/rtc/rtc-ps3.c | 4 +--
drivers/rtc/rtc-puv3.c | 8 ++---
drivers/rtc/rtc-rs5c348.c | 4 +--
drivers/rtc/rtc-rx8025.c | 2 +-
drivers/rtc/rtc-sa1100.c | 6 ++--
drivers/rtc/rtc-sh.c | 2 +-
drivers/rtc/rtc-sirfsoc.c | 10 +++---
drivers/rtc/rtc-snvs.c | 8 ++---
drivers/rtc/rtc-starfire.c | 2 +-
drivers/rtc/rtc-stk17ta8.c | 2 +-
drivers/rtc/rtc-stmp3xxx.c | 6 ++--
drivers/rtc/rtc-sun4v.c | 4 +--
drivers/rtc/rtc-sun6i.c | 6 ++--
drivers/rtc/rtc-sunxi.c | 4 +--
drivers/rtc/rtc-sysfs.c | 10 +++---
drivers/rtc/rtc-tegra.c | 8 ++---
drivers/rtc/rtc-test.c | 2 +-
drivers/rtc/rtc-tps6586x.c | 10 +++---
drivers/rtc/rtc-tx4939.c | 6 ++--
drivers/rtc/rtc-vr41xx.c | 12 +++----
drivers/rtc/rtc-wm831x.c | 8 ++---
drivers/rtc/rtc-xgene.c | 6 ++--
drivers/rtc/systohc.c | 4 +--
drivers/staging/android/alarm-dev.c | 10 ++++--
include/linux/rtc.h | 6 ++--
include/linux/time.h | 10 ++++--
include/linux/time64.h | 6 ++--
include/linux/timekeeping.h | 2 +-
kernel/compat.c | 4 ++-
kernel/power/suspend_test.c | 4 +--
kernel/time/time.c | 50 ++++++++++++++++++--------
kernel/time/timekeeping.c | 15 ++++----
103 files changed, 350 insertions(+), 288 deletions(-)
--
1.7.9.5
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