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Message-ID: <CAM4v1pOT-fE3Pv1rJqiADUo+5sk2rMvVg9mbgW3f3TnUHifeCQ@mail.gmail.com>
Date:	Mon, 10 Feb 2014 14:23:35 +0530
From:	Preeti Murthy <preeti.lkml@...il.com>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, nsekhar@...com,
	tony@...mide.com, egtvedt@...fundet.no, linux@...sktech.co.nz,
	geert@...ux-m68k.org, David.Laight@...lab.com,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, x86@...nel.org,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Subject: Re: [Update][PATCH 2/2] clocksource: Make clocksource register
 functions void

Hi Yijing,

For the powerpc part:
 Acked-by: Preeti U Murthy <preeti@...ux.vnet.ibm.com>

On Mon, Feb 10, 2014 at 7:28 AM, Yijing Wang <wangyijing@...wei.com> wrote:
> Currently, clocksource_register() and __clocksource_register_scale()
> functions always return 0, it's pointless, make functions void.
> And remove the dead code that check the clocksource_register_hz()
> return value.
>
> Acked-by: Hans-Christian Egtvedt <egtvedt@...fundet.no>
> Acked-by: Tony Prisk <linux@...sktech.co.nz>
> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
> ---
>  arch/arm/mach-davinci/time.c                    |    5 ++---
>  arch/arm/mach-msm/timer.c                       |    4 +---
>  arch/arm/mach-omap2/timer.c                     |    8 +++-----
>  arch/avr32/kernel/time.c                        |    4 +---
>  arch/blackfin/kernel/time-ts.c                  |    6 ++----
>  arch/microblaze/kernel/timer.c                  |    3 +--
>  arch/mips/jz4740/time.c                         |    6 +-----
>  arch/mips/loongson/common/cs5536/cs5536_mfgpt.c |    3 ++-
>  arch/openrisc/kernel/time.c                     |    3 +--
>  arch/powerpc/kernel/time.c                      |    6 +-----
>  arch/um/kernel/time.c                           |    6 +-----
>  arch/x86/platform/uv/uv_time.c                  |   14 ++++++--------
>  drivers/clocksource/acpi_pm.c                   |    3 ++-
>  drivers/clocksource/cadence_ttc_timer.c         |    6 +-----
>  drivers/clocksource/exynos_mct.c                |    4 +---
>  drivers/clocksource/i8253.c                     |    3 ++-
>  drivers/clocksource/mmio.c                      |    3 ++-
>  drivers/clocksource/samsung_pwm_timer.c         |    5 +----
>  drivers/clocksource/scx200_hrt.c                |    3 ++-
>  drivers/clocksource/tcb_clksrc.c                |    8 +-------
>  drivers/clocksource/timer-marco.c               |    2 +-
>  drivers/clocksource/timer-prima2.c              |    2 +-
>  drivers/clocksource/vt8500_timer.c              |    4 +---
>  include/linux/clocksource.h                     |    8 ++++----
>  kernel/time/clocksource.c                       |    6 ++----
>  kernel/time/jiffies.c                           |    3 ++-
>  26 files changed, 45 insertions(+), 83 deletions(-)
>
> diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c
> index 24ad30f..92b772f 100644
> --- a/arch/arm/mach-davinci/time.c
> +++ b/arch/arm/mach-davinci/time.c
> @@ -387,9 +387,8 @@ void __init davinci_timer_init(void)
>
>         /* setup clocksource */
>         clocksource_davinci.name = id_to_name[clocksource_id];
> -       if (clocksource_register_hz(&clocksource_davinci,
> -                                   davinci_clock_tick_rate))
> -               printk(err, clocksource_davinci.name);
> +       clocksource_register_hz(&clocksource_davinci,
> +                                   davinci_clock_tick_rate);
>
>         sched_clock_register(davinci_read_sched_clock, 32,
>                           davinci_clock_tick_rate);
> diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c
> index fd16449..ab485bc 100644
> --- a/arch/arm/mach-msm/timer.c
> +++ b/arch/arm/mach-msm/timer.c
> @@ -226,9 +226,7 @@ static void __init msm_timer_init(u32 dgt_hz, int sched_bits, int irq,
>
>  err:
>         writel_relaxed(TIMER_ENABLE_EN, source_base + TIMER_ENABLE);
> -       res = clocksource_register_hz(cs, dgt_hz);
> -       if (res)
> -               pr_err("clocksource_register failed\n");
> +       clocksource_register_hz(cs, dgt_hz);
>         sched_clock_register(msm_sched_clock_read, sched_bits, dgt_hz);
>  }
>
> diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
> index 74044aa..032e1da 100644
> --- a/arch/arm/mach-omap2/timer.c
> +++ b/arch/arm/mach-omap2/timer.c
> @@ -473,11 +473,9 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
>                                    OMAP_TIMER_NONPOSTED);
>         sched_clock_register(dmtimer_read_sched_clock, 32, clksrc.rate);
>
> -       if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
> -               pr_err("Could not register clocksource %s\n",
> -                       clocksource_gpt.name);
> -       else
> -               pr_info("OMAP clocksource: %s at %lu Hz\n",
> +       clocksource_register_hz(&clocksource_gpt, clksrc.rate);
> +
> +       pr_info("OMAP clocksource: %s at %lu Hz\n",
>                         clocksource_gpt.name, clksrc.rate);
>  }
>
> diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c
> index d0f771b..51b4a66 100644
> --- a/arch/avr32/kernel/time.c
> +++ b/arch/avr32/kernel/time.c
> @@ -134,9 +134,7 @@ void __init time_init(void)
>
>         /* figure rate for counter */
>         counter_hz = clk_get_rate(boot_cpu_data.clk);
> -       ret = clocksource_register_hz(&counter, counter_hz);
> -       if (ret)
> -               pr_debug("timer: could not register clocksource: %d\n", ret);
> +       clocksource_register_hz(&counter, counter_hz);
>
>         /* setup COMPARE clockevent */
>         comparator.mult = div_sc(counter_hz, NSEC_PER_SEC, comparator.shift);
> diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c
> index cb0a484..df3bb08 100644
> --- a/arch/blackfin/kernel/time-ts.c
> +++ b/arch/blackfin/kernel/time-ts.c
> @@ -51,8 +51,7 @@ static inline unsigned long long bfin_cs_cycles_sched_clock(void)
>
>  static int __init bfin_cs_cycles_init(void)
>  {
> -       if (clocksource_register_hz(&bfin_cs_cycles, get_cclk()))
> -               panic("failed to register clocksource");
> +       clocksource_register_hz(&bfin_cs_cycles, get_cclk());
>
>         return 0;
>  }
> @@ -103,8 +102,7 @@ static int __init bfin_cs_gptimer0_init(void)
>  {
>         setup_gptimer0();
>
> -       if (clocksource_register_hz(&bfin_cs_gptimer0, get_sclk()))
> -               panic("failed to register clocksource");
> +       clocksource_register_hz(&bfin_cs_gptimer0, get_sclk());
>
>         return 0;
>  }
> diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
> index fb0c614..5b8ec44 100644
> --- a/arch/microblaze/kernel/timer.c
> +++ b/arch/microblaze/kernel/timer.c
> @@ -213,8 +213,7 @@ static struct clocksource clocksource_microblaze = {
>
>  static int __init xilinx_clocksource_init(void)
>  {
> -       if (clocksource_register_hz(&clocksource_microblaze, timer_clock_freq))
> -               panic("failed to register clocksource");
> +       clocksource_register_hz(&clocksource_microblaze, timer_clock_freq);
>
>         /* stop timer1 */
>         out_be32(timer_baseaddr + TCSR1,
> diff --git a/arch/mips/jz4740/time.c b/arch/mips/jz4740/time.c
> index 5e430ce..041cdff 100644
> --- a/arch/mips/jz4740/time.c
> +++ b/arch/mips/jz4740/time.c
> @@ -105,7 +105,6 @@ static struct irqaction timer_irqaction = {
>
>  void __init plat_time_init(void)
>  {
> -       int ret;
>         uint32_t clk_rate;
>         uint16_t ctrl;
>
> @@ -121,10 +120,7 @@ void __init plat_time_init(void)
>
>         clockevents_register_device(&jz4740_clockevent);
>
> -       ret = clocksource_register_hz(&jz4740_clocksource, clk_rate);
> -
> -       if (ret)
> -               printk(KERN_ERR "Failed to register clocksource: %d\n", ret);
> +       clocksource_register_hz(&jz4740_clocksource, clk_rate);
>
>         setup_irq(JZ4740_IRQ_TCU0, &timer_irqaction);
>
> diff --git a/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c b/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> index c639b9d..9fa6d99 100644
> --- a/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> +++ b/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> @@ -208,7 +208,8 @@ int __init init_mfgpt_clocksource(void)
>         if (num_possible_cpus() > 1)    /* MFGPT does not scale! */
>                 return 0;
>
> -       return clocksource_register_hz(&clocksource_mfgpt, MFGPT_TICK_RATE);
> +       clocksource_register_hz(&clocksource_mfgpt, MFGPT_TICK_RATE);
> +       return 0;
>  }
>
>  arch_initcall(init_mfgpt_clocksource);
> diff --git a/arch/openrisc/kernel/time.c b/arch/openrisc/kernel/time.c
> index 7c52e94..3f789aa 100644
> --- a/arch/openrisc/kernel/time.c
> +++ b/arch/openrisc/kernel/time.c
> @@ -156,8 +156,7 @@ static struct clocksource openrisc_timer = {
>
>  static int __init openrisc_timer_init(void)
>  {
> -       if (clocksource_register_hz(&openrisc_timer, cpuinfo.clock_frequency))
> -               panic("failed to register clocksource");
> +       clocksource_register_hz(&openrisc_timer, cpuinfo.clock_frequency);
>
>         /* Enable the incrementer: 'continuous' mode with interrupt disabled */
>         mtspr(SPR_TTMR, SPR_TTMR_CR);
> diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
> index b3dab20..2e66b6f 100644
> --- a/arch/powerpc/kernel/time.c
> +++ b/arch/powerpc/kernel/time.c
> @@ -792,11 +792,7 @@ static void __init clocksource_init(void)
>         else
>                 clock = &clocksource_timebase;
>
> -       if (clocksource_register_hz(clock, tb_ticks_per_sec)) {
> -               printk(KERN_ERR "clocksource: %s is already registered\n",
> -                      clock->name);
> -               return;
> -       }
> +       clocksource_register_hz(clock, tb_ticks_per_sec);
>
>         printk(KERN_INFO "clocksource: %s mult[%x] shift[%d] registered\n",
>                clock->name, clock->mult, clock->shift);
> diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
> index 117568d..2034b58 100644
> --- a/arch/um/kernel/time.c
> +++ b/arch/um/kernel/time.c
> @@ -92,11 +92,7 @@ static void __init setup_itimer(void)
>                 clockevent_delta2ns(60 * HZ, &itimer_clockevent);
>         itimer_clockevent.min_delta_ns =
>                 clockevent_delta2ns(1, &itimer_clockevent);
> -       err = clocksource_register_hz(&itimer_clocksource, USEC_PER_SEC);
> -       if (err) {
> -               printk(KERN_ERR "clocksource_register_hz returned %d\n", err);
> -               return;
> -       }
> +       clocksource_register_hz(&itimer_clocksource, USEC_PER_SEC);
>         clockevents_register_device(&itimer_clockevent);
>  }
>
> diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c
> index 5c86786..b963774 100644
> --- a/arch/x86/platform/uv/uv_time.c
> +++ b/arch/x86/platform/uv/uv_time.c
> @@ -379,15 +379,13 @@ static __init int uv_rtc_setup_clock(void)
>         if (!is_uv_system())
>                 return -ENODEV;
>
> -       rc = clocksource_register_hz(&clocksource_uv, sn_rtc_cycles_per_second);
> -       if (rc)
> -               printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
> -       else
> -               printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",
> -                       sn_rtc_cycles_per_second/(unsigned long)1E6);
> +       clocksource_register_hz(&clocksource_uv, sn_rtc_cycles_per_second);
> +
> +       pr_info("UV RTC clocksource registered freq %lu MHz\n",
> +               sn_rtc_cycles_per_second/(unsigned long)1E6);
>
> -       if (rc || !uv_rtc_evt_enable || x86_platform_ipi_callback)
> -               return rc;
> +       if (!uv_rtc_evt_enable || x86_platform_ipi_callback)
> +               return 0;
>
>         /* Setup and register clockevents */
>         rc = uv_rtc_allocate_timers();
> diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c
> index 6eab889..ab1dc63 100644
> --- a/drivers/clocksource/acpi_pm.c
> +++ b/drivers/clocksource/acpi_pm.c
> @@ -218,8 +218,9 @@ static int __init init_acpi_pm_clocksource(void)
>                 return -ENODEV;
>         }
>
> -       return clocksource_register_hz(&clocksource_acpi_pm,
> +       clocksource_register_hz(&clocksource_acpi_pm,
>                                                 PMTMR_TICKS_PER_SEC);
> +       return 0;
>  }
>
>  /* We use fs_initcall because we want the PCI fixups to have run
> diff --git a/drivers/clocksource/cadence_ttc_timer.c b/drivers/clocksource/cadence_ttc_timer.c
> index 63f176d..b9b56ed 100644
> --- a/drivers/clocksource/cadence_ttc_timer.c
> +++ b/drivers/clocksource/cadence_ttc_timer.c
> @@ -301,11 +301,7 @@ static void __init ttc_setup_clocksource(struct clk *clk, void __iomem *base)
>         __raw_writel(CNT_CNTRL_RESET,
>                      ttccs->ttc.base_addr + TTC_CNT_CNTRL_OFFSET);
>
> -       err = clocksource_register_hz(&ttccs->cs, ttccs->ttc.freq / PRESCALE);
> -       if (WARN_ON(err)) {
> -               kfree(ttccs);
> -               return;
> -       }
> +       clocksource_register_hz(&ttccs->cs, ttccs->ttc.freq / PRESCALE);
>
>         ttc_sched_clock_val_reg = base + TTC_COUNT_VAL_OFFSET;
>         sched_clock_register(ttc_sched_clock_read, 16, ttccs->ttc.freq / PRESCALE);
> diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
> index 48f76bc..fcb9454 100644
> --- a/drivers/clocksource/exynos_mct.c
> +++ b/drivers/clocksource/exynos_mct.c
> @@ -197,9 +197,7 @@ struct clocksource mct_frc = {
>  static void __init exynos4_clocksource_init(void)
>  {
>         exynos4_mct_frc_start(0, 0);
> -
> -       if (clocksource_register_hz(&mct_frc, clk_rate))
> -               panic("%s: can't register clocksource\n", mct_frc.name);
> +       clocksource_register_hz(&mct_frc, clk_rate);
>  }
>
>  static void exynos4_mct_comp0_stop(void)
> diff --git a/drivers/clocksource/i8253.c b/drivers/clocksource/i8253.c
> index 14ee3ef..9c45f0a 100644
> --- a/drivers/clocksource/i8253.c
> +++ b/drivers/clocksource/i8253.c
> @@ -95,7 +95,8 @@ static struct clocksource i8253_cs = {
>
>  int __init clocksource_i8253_init(void)
>  {
> -       return clocksource_register_hz(&i8253_cs, PIT_TICK_RATE);
> +       clocksource_register_hz(&i8253_cs, PIT_TICK_RATE);
> +       return 0;
>  }
>  #endif
>
> diff --git a/drivers/clocksource/mmio.c b/drivers/clocksource/mmio.c
> index c0e2512..6e0b530 100644
> --- a/drivers/clocksource/mmio.c
> +++ b/drivers/clocksource/mmio.c
> @@ -69,5 +69,6 @@ int __init clocksource_mmio_init(void __iomem *base, const char *name,
>         cs->clksrc.mask = CLOCKSOURCE_MASK(bits);
>         cs->clksrc.flags = CLOCK_SOURCE_IS_CONTINUOUS;
>
> -       return clocksource_register_hz(&cs->clksrc, hz);
> +       clocksource_register_hz(&cs->clksrc, hz);
> +       return 0;
>  }
> diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c
> index 5645cfc..c59292f 100644
> --- a/drivers/clocksource/samsung_pwm_timer.c
> +++ b/drivers/clocksource/samsung_pwm_timer.c
> @@ -340,7 +340,6 @@ static void __init samsung_clocksource_init(void)
>  {
>         unsigned long pclk;
>         unsigned long clock_rate;
> -       int ret;
>
>         pclk = clk_get_rate(pwm.timerclk);
>
> @@ -361,9 +360,7 @@ static void __init samsung_clocksource_init(void)
>                                                 pwm.variant.bits, clock_rate);
>
>         samsung_clocksource.mask = CLOCKSOURCE_MASK(pwm.variant.bits);
> -       ret = clocksource_register_hz(&samsung_clocksource, clock_rate);
> -       if (ret)
> -               panic("samsung_clocksource_timer: can't register clocksource\n");
> +       clocksource_register_hz(&samsung_clocksource, clock_rate);
>  }
>
>  static void __init samsung_timer_resources(void)
> diff --git a/drivers/clocksource/scx200_hrt.c b/drivers/clocksource/scx200_hrt.c
> index 64f9e82..57bdc04 100644
> --- a/drivers/clocksource/scx200_hrt.c
> +++ b/drivers/clocksource/scx200_hrt.c
> @@ -83,7 +83,8 @@ static int __init init_hrt_clocksource(void)
>
>         pr_info("enabling scx200 high-res timer (%s MHz +%d ppm)\n", mhz27 ? "27":"1", ppm);
>
> -       return clocksource_register_hz(&cs_hrt, freq);
> +       clocksource_register_hz(&cs_hrt, freq);
> +       return 0;
>  }
>
>  module_init(init_hrt_clocksource);
> diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
> index 00fdd11..805245d 100644
> --- a/drivers/clocksource/tcb_clksrc.c
> +++ b/drivers/clocksource/tcb_clksrc.c
> @@ -340,9 +340,7 @@ static int __init tcb_clksrc_init(void)
>         }
>
>         /* and away we go! */
> -       ret = clocksource_register_hz(&clksrc, divided_rate);
> -       if (ret)
> -               goto err_disable_t1;
> +       clocksource_register_hz(&clksrc, divided_rate);
>
>         /* channel 2:  periodic and oneshot timer support */
>         ret = setup_clkevents(tc, clk32k_divisor_idx);
> @@ -354,10 +352,6 @@ static int __init tcb_clksrc_init(void)
>  err_unregister_clksrc:
>         clocksource_unregister(&clksrc);
>
> -err_disable_t1:
> -       if (!tc->tcb_config || tc->tcb_config->counter_width != 32)
> -               clk_disable_unprepare(tc->clk[1]);
> -
>  err_disable_t0:
>         clk_disable_unprepare(t0_clk);
>
> diff --git a/drivers/clocksource/timer-marco.c b/drivers/clocksource/timer-marco.c
> index 09a17d9..ae78ce0 100644
> --- a/drivers/clocksource/timer-marco.c
> +++ b/drivers/clocksource/timer-marco.c
> @@ -283,7 +283,7 @@ static void __init sirfsoc_marco_timer_init(void)
>         /* Clear all interrupts */
>         writel_relaxed(0xFFFF, sirfsoc_timer_base + SIRFSOC_TIMER_INTR_STATUS);
>
> -       BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE));
> +       clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE);
>
>         sirfsoc_clockevent_init();
>  }
> diff --git a/drivers/clocksource/timer-prima2.c b/drivers/clocksource/timer-prima2.c
> index 8a492d3..c9cc307 100644
> --- a/drivers/clocksource/timer-prima2.c
> +++ b/drivers/clocksource/timer-prima2.c
> @@ -204,7 +204,7 @@ static void __init sirfsoc_prima2_timer_init(struct device_node *np)
>         writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_HI);
>         writel_relaxed(BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_STATUS);
>
> -       BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE));
> +       clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE);
>
>         sched_clock_register(sirfsoc_read_sched_clock, 64, CLOCK_TICK_RATE);
>
> diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c
> index 1098ed3..13f5fa4 100644
> --- a/drivers/clocksource/vt8500_timer.c
> +++ b/drivers/clocksource/vt8500_timer.c
> @@ -150,9 +150,7 @@ static void __init vt8500_timer_init(struct device_node *np)
>         writel(0xf, regbase + TIMER_STATUS_VAL);
>         writel(~0, regbase + TIMER_MATCH_VAL);
>
> -       if (clocksource_register_hz(&clocksource, VT8500_TIMER_HZ))
> -               pr_err("%s: vt8500_timer_init: clocksource_register failed for %s\n",
> -                                       __func__, clocksource.name);
> +       clocksource_register_hz(&clocksource, VT8500_TIMER_HZ);
>
>         clockevent.cpumask = cpumask_of(0);
>
> diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
> index 67301a4..5a17c5e 100644
> --- a/include/linux/clocksource.h
> +++ b/include/linux/clocksource.h
> @@ -282,7 +282,7 @@ static inline s64 clocksource_cyc2ns(cycle_t cycles, u32 mult, u32 shift)
>  }
>
>
> -extern int clocksource_register(struct clocksource*);
> +extern void clocksource_register(struct clocksource *);
>  extern int clocksource_unregister(struct clocksource*);
>  extern void clocksource_touch_watchdog(void);
>  extern struct clocksource* clocksource_get_next(void);
> @@ -301,17 +301,17 @@ clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 minsec);
>   * Don't call __clocksource_register_scale directly, use
>   * clocksource_register_hz/khz
>   */
> -extern int
> +extern void
>  __clocksource_register_scale(struct clocksource *cs, u32 scale, u32 freq);
>  extern void
>  __clocksource_updatefreq_scale(struct clocksource *cs, u32 scale, u32 freq);
>
> -static inline int clocksource_register_hz(struct clocksource *cs, u32 hz)
> +static inline void clocksource_register_hz(struct clocksource *cs, u32 hz)
>  {
>         return __clocksource_register_scale(cs, 1, hz);
>  }
>
> -static inline int clocksource_register_khz(struct clocksource *cs, u32 khz)
> +static inline void clocksource_register_khz(struct clocksource *cs, u32 khz)
>  {
>         return __clocksource_register_scale(cs, 1000, khz);
>  }
> diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
> index 9951575..686ff72 100644
> --- a/kernel/time/clocksource.c
> +++ b/kernel/time/clocksource.c
> @@ -782,7 +782,7 @@ EXPORT_SYMBOL_GPL(__clocksource_updatefreq_scale);
>   * This *SHOULD NOT* be called directly! Please use the
>   * clocksource_register_hz() or clocksource_register_khz helper functions.
>   */
> -int __clocksource_register_scale(struct clocksource *cs, u32 scale, u32 freq)
> +void __clocksource_register_scale(struct clocksource *cs, u32 scale, u32 freq)
>  {
>
>         /* Initialize mult/shift and max_idle_ns */
> @@ -794,7 +794,6 @@ int __clocksource_register_scale(struct clocksource *cs, u32 scale, u32 freq)
>         clocksource_enqueue_watchdog(cs);
>         clocksource_select();
>         mutex_unlock(&clocksource_mutex);
> -       return 0;
>  }
>  EXPORT_SYMBOL_GPL(__clocksource_register_scale);
>
> @@ -804,7 +803,7 @@ EXPORT_SYMBOL_GPL(__clocksource_register_scale);
>   * @cs:                clocksource to be registered
>   *
>   */
> -int clocksource_register(struct clocksource *cs)
> +void clocksource_register(struct clocksource *cs)
>  {
>         /* calculate max adjustment for given mult/shift */
>         cs->maxadj = clocksource_max_adjustment(cs);
> @@ -820,7 +819,6 @@ int clocksource_register(struct clocksource *cs)
>         clocksource_enqueue_watchdog(cs);
>         clocksource_select();
>         mutex_unlock(&clocksource_mutex);
> -       return 0;
>  }
>  EXPORT_SYMBOL(clocksource_register);
>
> diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c
> index 7a925ba..ae4c534 100644
> --- a/kernel/time/jiffies.c
> +++ b/kernel/time/jiffies.c
> @@ -88,7 +88,8 @@ EXPORT_SYMBOL(jiffies);
>
>  static int __init init_jiffies_clocksource(void)
>  {
> -       return clocksource_register(&clocksource_jiffies);
> +       clocksource_register(&clocksource_jiffies);
> +       return 0;
>  }
>
>  core_initcall(init_jiffies_clocksource);
> --
> 1.7.1
>
>
> --
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