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* posix-cpu-timers: Make timespec to nsec conversion safeThomas Gleixner2017-06-201-1/+5
| | | | | | | | | | | | | | | | | | | | The expiry time of a posix cpu timer is supplied through sys_timer_set() via a struct timespec. The timespec is validated for correctness. In the actual set timer implementation the timespec is converted to a scalar nanoseconds value. If the tv_sec part of the time spec is large enough the conversion to nanoseconds (sec * NSEC_PER_SEC) overflows 64bit. Mitigate that by using the timespec_to_ktime() conversion function, which checks the tv_sec part for a potential mult overflow and clamps the result to KTIME_MAX, which is about 292 years. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20170620154113.588276707@linutronix.de
* itimer: Make timeval to nsec conversion range limitedThomas Gleixner2017-06-201-2/+6
| | | | | | | | | | | | | | | | | | | | The expiry time of a itimer is supplied through sys_setitimer() via a struct timeval. The timeval is validated for correctness. In the actual set timer implementation the timeval is converted to a scalar nanoseconds value. If the tv_sec part of the time spec is large enough the conversion to nanoseconds (sec * NSEC_PER_SEC) overflows 64bit. Mitigate that by using the timeval_to_ktime() conversion function, which checks the tv_sec part for a potential mult overflow and clamps the result to KTIME_MAX, which is about 292 years. Reported-by: Xishi Qiu <qiuxishi@huawei.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20170620154113.505981643@linutronix.de
* timers: Fix parameter description of try_to_del_timer_sync()Peter Meerwald-Stadler2017-06-201-1/+1
| | | | | | | | | Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Link: http://lkml.kernel.org/r/20170530194103.7454-1-pmeerw@pmeerw.net Cc: John Stultz <john.stultz@linaro.org> Cc: trivial@rustcorp.com.au Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* ktime: Simplify ktime_compare implementationMariusz Skamra2017-06-201-5/+1Star
| | | | | | | | | | ktime_sub can be used here instread of two conditional checks. Signed-off-by: Mariusz Skamra <mariuszx.skamra@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@intel.com> Link: http://lkml.kernel.org/r/1495803647-9504-1-git-send-email-mariuszx.skamra@intel.com
* Merge branch 'clockevents/4.13' of ↵Thomas Gleixner2017-06-20111-743/+791
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://git.linaro.org/people/daniel.lezcano/linux into timers/core Pull clockevent changes from Daniel Lezcano: - Factored out moxart, aspeed, cortina drivers into a generic timer fttrm010. Take the opportunity to add the delay timer (Linus Walleij) - Saved / restored tcb atmel context at suspend/resume (Alexandre Belloni) - Added ast2500 compatible string and fixed aspeed2500 initialization (Daniel Lezcano) - Added clock names property for aspeed (Andrew Jeffery) - Renamed clocksource_of to timer_of (Daniel Lezcano) - Added a common timer init routine (Daniel Lezcano)
| * clocksource/drivers/fttmr010: Factor out clock read codeLinus Walleij2017-06-141-10/+6Star
| | | | | | | | | | | | | | | | | | | | | | | | The sched_clock() and delay timer callbacks can just call each other and we can save an #ifdef. Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Andrew Jeffery <andrew@aj.id.au> Cc: Joel Stanley <joel@jms.id.au> Cc: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Implement delay timerLinus Walleij2017-06-141-1/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This timer is often used on the ARM architecture, so as with so many siblings, we can implement delay timers, removing the need for the system to calibrate jiffys at boot, and potentially handling CPU frequency scaling on targets. We cannot just protect the Kconfig with a "depends on ARM" because it is already known that different architectures are using Faraday IP blocks, so it is better to make things open-ended and use Result on boot dmesg: Switching to timer-based delay loop, resolution 40n Calibrating delay loop (skipped), value calculated using timer frequency.. 50.00 BogoMIPS (lpj=250000) This is accurately the timer frequency, 250MHz on the APB bus. Cc: Andrew Jeffery <andrew@aj.id.au> Cc: Joel Stanley <joel@jms.id.au> Cc: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Tested-by: Andrew Jeffery <andrew@aj.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers: Add timer-of common init routineDaniel Lezcano2017-06-144-0/+243
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The different drivers are all using the same pattern when initializing. 1. Get the base address 2. Get the irq number 3. Get the clock 4. Prepare and enable the clock 5. Get the rate 6. Request an interrupt Instead of repeating again and again these steps in all the drivers, let's provide a common init routine to give the opportunity to factor all of them out. We can expect a significant kernel size improvement when the common routine will be used in all the drivers. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/tcb_clksrc: Save timer context on suspend/resumeAlexandre Belloni2017-06-141-0/+51
| | | | | | | | | | | | | | | | On sama5d2, power to the core may be cut while entering suspend mode. It is necessary to save and restore the TCB registers. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Optimize sched_clock()Linus Walleij2017-06-141-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sched_clock() call should be really fast so we want to avoid an extra if() clause on the read path if possible. Implement two sched_clock_read() functions, one if the timer counts up and one if it counts down. Incidentally this also mirrors how clocksource_mmio_init() works and make things simple and easy to understand. Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Andrew Jeffery <andrew@aj.id.au> Cc: Joel Stanley <joel@jms.id.au> Cc: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers: Add an alias macro CLOCKSOURCE_OF_DECLAREDaniel Lezcano2017-06-141-0/+3
| | | | | | | | | | | | | | | | | | | | The macro CLOCKSOURCE_OF_DECLARE has been rename to TIMER_OF_DECLARE. In order to prevent conflicts for the next merge window, a temporary alias has been added which will be removed later. Cc: Arnd Bergman <arnd@arndb.de> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers: Rename CLKSRC_ACPI to TIMER_ACPIDaniel Lezcano2017-06-141-2/+2
| | | | | | | | | | | | | | | | The config option name is now renamed to 'TIMER_ACPI' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * clocksource/drivers: Rename CLKSRC_OF to TIMER_OFDaniel Lezcano2017-06-1418-51/+51
| | | | | | | | | | | | | | | | The config option name is now renamed to 'TIMER_OF' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * clocksource/drivers: Rename clksrc table to timerDaniel Lezcano2017-06-143-14/+15
| | | | | | | | | | | | | | | | The table name is now renamed to 'timer' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * clocksource/drivers: Rename CLOCKSOURCE_ACPI_DECLARE to TIMER_ACPI_DECLAREDaniel Lezcano2017-06-142-2/+2
| | | | | | | | | | | | | | | | The macro name is now renamed to 'TIMER_ACPI_DECLARE' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * clocksource/drivers: Rename clocksource_probe to timer_probeDaniel Lezcano2017-06-1425-30/+30
| | | | | | | | | | | | | | | | | | | | The function name is now renamed to 'timer_probe' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLAREDaniel Lezcano2017-06-1462-103/+103
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the clocksource at early stage. However, this macro is also used to initialize the clockevent if any, or the clockevent only. It was originally suggested to declare another macro to initialize a clockevent, so in order to separate the two entities even they belong to the same IP. This was not accepted because of the impact on the DT where splitting a clocksource/clockevent definition does not make sense as it is a Linux concept not a hardware description. On the other side, the clocksource has not interrupt declared while the clockevent has, so it is easy from the driver to know if the description is for a clockevent or a clocksource, IOW it could be implemented at the driver level. So instead of dealing with a named clocksource macro, let's use a more generic one: TIMER_OF_DECLARE. The patch has not functional changes. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
| * Revert "clockevents: Add a clkevt-of mechanism like clksrc-of"Daniel Lezcano2017-06-125-75/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | After discussing it, this feature is dropped as it is not considered adequate: https://patchwork.kernel.org/patch/9639317/ There is no user of this macro yet, so there is no impact on the drivers. This reverts commit 376bc27150f180d9f5eddec6a14117780177589d. Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Fix aspeed-2500 initializationDaniel Lezcano2017-06-121-7/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent changes made the fttmr010 to be more generic and support different timers with a very few differences like moxart or aspeed. The aspeed timer uses a countdown and there is a test against the aspeed2400 compatible string to set a flag. With the previous patch, we added the aspeed2500 compatible string but without taking care of setting the countdown flag. Fix this by specifiying a init function and pass the aspeed flag to a common init function. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Andrew Jeffery <andrew@aj.id.au> Reviewed-by: Andrew Jeffery <andrew@aj.id.au> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Add AST2500 compatible stringDaniel Lezcano2017-06-122-1/+4
| | | | | | | | | | | | | | | | | | | | Also clean up space-before-tab issues in the documentation. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Acked-by: Joel Stanley <joel@jms.id.au> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Merge Moxa into FTTMR010Linus Walleij2017-06-126-303/+108Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This merges the Moxa Art timer driver into the Faraday FTTMR010 driver and replaces all Kconfig symbols to use the Faraday driver instead. We are now so similar that the drivers can be merged by just adding a few lines to the Faraday timer. Differences: - The Faraday driver explicitly sets the counter to count upwards for the clocksource, removing the need for the clocksource core to invert the value. - The Faraday driver also handles sched_clock() On the Aspeed, the counter can only count downwards, so support the timers in downward-counting mode as well, and flag the Aspeed to use this mode. This mode was tested on the Gemini so I have high hopes that it'll work fine on the Aspeed as well. After this we have one driver for all three SoCs and a generic Faraday FTTMR010 timer driver, which is nice. Cc: Joel Stanley <joel@jms.id.au> Cc: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Switch to use TIMER2 srcLinus Walleij2017-06-121-11/+10Star
| | | | | | | | | | | | | | | | | | | | | | | | This switches the clocksource to TIMER2 like the Moxart driver does. Mainly to make it more similar to the Moxart/Aspeed driver but also because it seems more neat to use the timers in order: use timer 1, then timer 2. Cc: Joel Stanley <joel@jms.id.au> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Switch to use bitopsLinus Walleij2017-06-121-21/+22
| | | | | | | | | | | | | | | | | | | | This switches the drivers to use the bitops BIT() macro to define bits. Cc: Joel Stanley <joel@jms.id.au> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Use state containerLinus Walleij2017-06-121-74/+116
| | | | | | | | | | | | | | | | | | | | | | This converts the Faraday FTTMR010 to use the state container design pattern. Take some care to handle the state container and free:ing of resources as has been done in the Moxa driver. Cc: Joel Stanley <joel@jms.id.au> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Drop Gemini specificsLinus Walleij2017-06-121-81/+22Star
| | | | | | | | | | | | | | | | | | | | | | | | The Gemini now has a proper clock driver and a proper PCLK assigned in its device tree. Drop the Gemini-specific hacks to look up the system speed and rely on the clock framework like everyone else. Cc: Joel Stanley <joel@jms.id.au> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Merge FTTMR010 DT bindingsLinus Walleij2017-06-122-20/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This merges the Moxa and FTTMR010 device tree bindings into the Faraday binding document to avoid confusion. The FTTMR010 is the IP block used by these SoCs, in vanilla or modified variant. The Aspeed variant is modified such that it is no longer fully register-compatible with FTTMR010 so for this reason it is not listed with two compatible strings, instead just one. Cc: Joel Stanley <joel@jms.id.au> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * clocksource/drivers/fttmr010: Fix the clock handlingLinus Walleij2017-06-121-1/+7
| | | | | | | | | | | | | | | | | | We need to also prepare and enable the clock we are using to get the right reference count and avoid it being shut off. Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
| * arm: aspeed: Add clock-names property to timer nodeAndrew Jeffery2017-06-122-0/+2
| | | | | | | | | | | | | | | | | | The merging of a number of clocksource drivers into fttmr010 means we require clock-names to be specified in the Aspeed timer node, else the clocksource fails to probe and boot hangs. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* | posix-timers: Make nanosleep timespec argument constThomas Gleixner2017-06-146-8/+8
| | | | | | | | | | | | | | | | | | No nanosleep implementation modifies the rqtp argument. Mark is const. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org>
* | posix-cpu-timers: Avoid timespec conversion in do_cpu_nanosleep()Thomas Gleixner2017-06-141-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | No point in converting the expiry time back and forth. No point either to update the value in the caller supplied variable. mark the rqtp argument const. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org>
* | time: Move compat_gettimeofday()/settimeofday() to nativeAl Viro2017-06-142-38/+41
| | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-16-viro@ZenIV.linux.org.uk
* | time: Move compat_time()/stime() to nativeAl Viro2017-06-142-40/+41
| | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-15-viro@ZenIV.linux.org.uk
* | posix-timers: Move compat_timer_create() to native, get rid of set_fs()Al Viro2017-06-143-36/+42
| | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-14-viro@ZenIV.linux.org.uk
* | posix-timers: Move compat versions of clock_gettime/settime/getresAl Viro2017-06-143-55/+115
| | | | | | | | | | | | | | | | | | | | | | Move them to the native implementations and get rid of the set_fs() hackery. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-13-viro@ZenIV.linux.org.uk
* | itimers: Move compat itimer syscalls to native onesAl Viro2017-06-144-53/+60
| | | | | | | | | | | | | | | | | | | | | | get rid of set_fs(), sanitize compat copyin/copyout. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-12-viro@ZenIV.linux.org.uk
* | posix-timers: Take compat timer_gettime(2) to native oneAl Viro2017-06-143-26/+35
| | | | | | | | | | | | | | | | | | | | | | ... and get rid of set_fs() in there Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-11-viro@ZenIV.linux.org.uk
* | posix-timers: Take compat timer_settime(2) to native oneAl Viro2017-06-143-47/+64
| | | | | | | | | | | | | | | | | | | | | | ... and get rid of set_fs() in there Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-10-viro@ZenIV.linux.org.uk
* | ntp: Move adjtimex related compat syscalls to native counterpartsAl Viro2017-06-145-90/+108
| | | | | | | | | | | | | | | | | | | | | | | | Get rid of set_fs() mess and sanitize compat_{get,put}_timex(), while we are at it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-9-viro@ZenIV.linux.org.uk
* | posix-timers: Kill ->nsleep_restart()Al Viro2017-06-145-13/+1Star
| | | | | | | | | | | | | | | | | | | | | | No more users. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-8-viro@ZenIV.linux.org.uk
* | hrtimers/posix-timers: Merge nanosleep timespec copyout logics into a new helperAl Viro2017-06-144-29/+25Star
| | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-7-viro@ZenIV.linux.org.uk
* | time/posix-timers: Move the compat copyouts to the nanosleep implementationsAl Viro2017-06-148-171/+142Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Turn restart_block.nanosleep.{rmtp,compat_rmtp} into a tagged union (kind = 1 -> native, kind = 2 -> compat, kind = 0 -> nothing) and make the places doing actual copyout handle compat as well as native (that will become a helper in the next commit). Result: compat wrappers, messing with reassignments, etc. are gone. [ tglx: Folded in a variant of Peter Zijlstras enum patch ] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-6-viro@ZenIV.linux.org.uk
* | posix-timers: Store rmtp into restart_block in sys_clock_nanosleep()Al Viro2017-06-144-22/+10Star
| | | | | | | | | | | | | | | | | | | | | | ... instead of doing that in every ->nsleep() instance Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-5-viro@ZenIV.linux.org.uk
* | hrtimer: Move copyout of remaining time to do_nanosleep()Al Viro2017-06-141-42/+20Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hrtimer nanosleep() implementation can be simplified by moving the copy out of the remaining time to do_nanosleep() which is shared between the real nanosleep function and the restart function. The pointer to the timespec64 which is updated is already stored in the restart block at the call site, so the seperate handling of nanosleep and restart function can be avoided. [ tglx: Added changelog ] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-4-viro@ZenIV.linux.org.uk
* | hrtimer_nanosleep(): Pass rmtp in restart_blockAl Viro2017-06-145-11/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Store the pointer to the timespec which gets updated with the remaining time in the restart block and remove the function argument. [ tglx: Added changelog ] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-3-viro@ZenIV.linux.org.uk
* | alarmtimer: Move copyout and freeze handling into alarmtimer_do_nsleep()Al Viro2017-06-141-70/+32Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The alarmtimer nanosleep() implementation can be simplified by moving the copy out of the remaining time to alarmtimer_do_nsleep() which is shared between the real nanosleep function and the restart function. The pointer to the timespec64 which is updated has to be stored in the restart block anyway. Instead of storing it only in the restart case, store it before calling alarmtimer_do_nsleep() and copy the remaining time in the signal exit path. [ tglx: Added changelog ] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-2-viro@ZenIV.linux.org.uk
* | posix-cpu-timers: Move copyout of timespec into do_cpu_nanosleep()Al Viro2017-06-141-35/+28Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The posix-cpu-timer nanosleep() implementation can be simplified by moving the copy out of the remaining time to do_cpu_nanosleep() which is shared between the real nanosleep function and the restart function. The pointer to the timespec64 which is updated has to be stored in the restart block anyway. Instead of storing it only in the restart case, store it before calling do_cpu_nanosleep() and copy the remaining time in the signal exit path. [ tglx: Added changelog ] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170607084241.28657-1-viro@ZenIV.linux.org.uk
* | posix-timers: Handle relative posix-timers correctlyThomas Gleixner2017-06-121-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent rework of the posix timer internals broke the magic posix mechanism, which requires that relative timers are not affected by modifications of the underlying clock. That means relative CLOCK_REALTIME timers cannot use CLOCK_REALTIME, because that can be set and adjusted. The underlying hrtimer switches the clock for these timers to CLOCK_MONOTONIC. That still works, but reading the remaining time of such a timer has been broken in the rework. The old code used the hrtimer internals directly and avoided the posix clock callbacks. Now common_timer_get() uses the underlying kclock->timer_get() callback, which is still CLOCK_REALTIME based. So the remaining time of such a timer is calculated against the wrong time base. Handle it by switching the k_itimer->kclock pointer according to the resulting hrtimer mode. k_itimer->it_clock still contains CLOCK_REALTIME because the timer might be set with ABSTIME later and then it needs to switch back to the realtime posix clock implementation. Fixes: eae1c4ae275f ("posix-timers: Make use of cancel/arm callbacks") Reported-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Link: http://lkml.kernel.org/r/20170609201156.GB21491@outlook.office365.com
* | posix-timers: Zero out oldval itimerspecThomas Gleixner2017-06-121-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent posix timer rework moved the clearing of the itimerspec to the real syscall implementation, but forgot that the kclock->timer_get() is used by timer_settime() as well. That results in an uninitialized variable and bogus values returned to user space. Add the missing memset to timer_settime(). Fixes: eabdec043853 ("posix-timers: Zero settings value in common code") Reported-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Link: http://lkml.kernel.org/r/20170609201156.GB21491@outlook.office365.com
* | posix-timers: Fix inverted SIGEV_NONE logic in common_timer_get()Thomas Gleixner2017-06-121-1/+1
|/ | | | | | | | | | | | | | | | | The refactoring of the posix-timer core to allow better code sharing introduced inverted logic vs. SIGEV_NONE timers in common_timer_get(). That causes hrtimer_forward() to be called on active timers, which rightfully triggers the warning hrtimer_forward(). Make sig_none what it says: signal mode == SIGEV_NONE. Fixes: 91d57bae0868 ("posix-timers: Make use of forward/remaining callbacks") Reported-by: Ye Xiaolong <xiaolong.ye@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20170609104457.GA39907@inn.lkp.intel.com
* alarmtimer: Switch over to generic set/get/rearm routineThomas Gleixner2017-06-043-110/+29Star
| | | | | | | | | | | | All required callbacks are in place. Switch the alarm timer based posix interval timer callbacks to the common implementation and remove the incorrect private implementation. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20170530211657.825471962@linutronix.de
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