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* posix_clocks: Use get_itimerspec64() and put_itimerspec64()Deepa Dinamani2017-06-301-28/+16
| | | | | | | | | | | | | | Usage of these apis and their compat versions makes the syscalls: timer_settime and timer_gettime and their compat implementations simpler. This patch also serves as a preparatory patch for changing syscalls to use new time_t data types to support the y2038 effort by isolating the processing of user pointers through these apis. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nanosleep: Use get_timespec64() and put_timespec64()Deepa Dinamani2017-06-301-12/+8
| | | | | | | | | | | | | Usage of these apis and their compat versions makes the syscalls: clock_nanosleep and nanosleep and their compat implementations simpler. This is a preparatory patch to isolate data conversions to struct timespec64 at userspace boundaries. This helps contain the changes needed to transition to new y2038 safe types. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* posix-timers: Use get_timespec64() and put_timespec64()Deepa Dinamani2017-06-301-38/+25
| | | | | | | | | | | | | Usage of these apis and their compat versions makes the syscalls: clock_gettime, clock_settime, clock_getres and their compat implementations simpler. This is a preparatory patch to isolate data conversions to struct timespec64 at userspace boundaries. This helps contain the changes needed to transition to new y2038 safe types. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* posix-timers: Make nanosleep timespec argument constThomas Gleixner2017-06-141-2/+2
| | | | | | | | | 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-timers: Move compat_timer_create() to native, get rid of set_fs()Al Viro2017-06-141-18/+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/20170607084241.28657-14-viro@ZenIV.linux.org.uk
* posix-timers: Move compat versions of clock_gettime/settime/getresAl Viro2017-06-141-4/+62
| | | | | | | | | | | 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
* posix-timers: Take compat timer_gettime(2) to native oneAl Viro2017-06-141-9/+34
| | | | | | | | | | | ... 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 Viro2017-06-141-24/+63
| | | | | | | | | | | ... 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 Viro2017-06-141-0/+27
| | | | | | | | | | | | 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 Viro2017-06-141-4/+0
| | | | | | | | | | | 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
* time/posix-timers: Move the compat copyouts to the nanosleep implementationsAl Viro2017-06-141-8/+24
| | | | | | | | | | | | | | | | | 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 Viro2017-06-141-5/+5
| | | | | | | | | | | ... 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_nanosleep(): Pass rmtp in restart_blockAl Viro2017-06-141-1/+4
| | | | | | | | | | | | | | 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
* 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 Gleixner2017-06-041-7/+5
| | | | | | | | | | | | 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
* posix-timers: Make use of cancel/arm callbacksThomas Gleixner2017-06-041-81/+100
| | | | | | | | | | | | Replace the hrtimer calls by calls to the new try_to_cancel()/arm() kclock callbacks and move the hrtimer specific implementation into the corresponding callback functions. 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/20170530211657.355396667@linutronix.de
* posix-timers: Zero settings value in common codeThomas Gleixner2017-06-041-2/+1
| | | | | | | | | | | Zero out the settings struct in the common code so the callbacks do not have to do it themself. 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/20170530211657.200870713@linutronix.de
* posix-timers: Make use of forward/remaining callbacksThomas Gleixner2017-06-041-15/+49
| | | | | | | | | | | | Replace the hrtimer calls by calls to the new forward/remaining kclock callbacks and move the hrtimer specific implementation into the corresponding callback functions. 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/20170530211657.121437232@linutronix.de
* posix-timers: Add active flag to k_itimerThomas Gleixner2017-06-041-1/+7
| | | | | | | | | | | | Keep track of the activation state of posix timers. This is a preparatory change for making common_timer_get() usable by both hrtimer and alarm timer implementations. 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/20170530211656.967783982@linutronix.de
* posix-timers: Use timer_rearm() callback in posixtimer_rearm()Thomas Gleixner2017-06-041-6/+6
| | | | | | | | | | | | | Use the new timer_rearm() callback to replace the conditional hardcoded calls into the hrtimer and cpu timer code. This allows later to bring the same logic to alarmtimers. 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/20170530211656.889661919@linutronix.de
* posix-timers: Rename do_schedule_next_timerThomas Gleixner2017-06-041-5/+5
| | | | | | | | | | | That function is a misnomer. Rename it with a proper prefix to posixtimer_rearm(). 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/20170530211656.811362578@linutronix.de
* posix-timers: Store k_clock pointer in k_itimerThomas Gleixner2017-06-041-3/+4
| | | | | | | | | | | | Having the k_clock pointer in the k_itimer struct avoids the lookup in several code pathes and makes the next steps of unification of the hrtimer and alarmtimer based posix timers simpler. 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/20170530211656.641222072@linutronix.de
* posix-timers: Move interval out of the unionThomas Gleixner2017-06-041-10/+10
| | | | | | | | | | | | | | Preparatory patch to unify the alarm timer and hrtimer based posix interval timer handling. The interval is used as a criteria for rearming decisions so moving it out of the clock specific data structures allows later unification. 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/20170530211656.563922908@linutronix.de
* posix-timers: Unify overrun/requeue_pending handlingThomas Gleixner2017-06-041-7/+8
| | | | | | | | | | | | | hrtimer based posix-timers and posix-cpu-timers handle the update of the rearming and overflow related status fields differently. Move that update to the common rearming code. 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/20170530211656.484936964@linutronix.de
* posix-timers: Move posix-timer internals to coreThomas Gleixner2017-06-041-0/+1
| | | | | | | | | | | | None of these declarations is required outside of kernel/time. Move them to an internal header. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20170530211656.394803853@linutronix.de
* posix-timers: Avoid gazillions of forward declarationsThomas Gleixner2017-06-041-101/+89
| | | | | | | | | | | Move it below the actual implementations as there are new callbacks coming which would require even more forward declarations. 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/20170530211656.238209952@linutronix.de
* posix-timers: Remove unused export of posix_timer_event()Thomas Gleixner2017-06-041-1/+0
| | | | | | | | | | Since the removal of the mmtimer driver the export is not longer needed. 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/20170530211656.052744418@linutronix.de
* posix-timers: Make posix_clocks immutableChristoph Hellwig2017-05-271-102/+89
| | | | | | | | | | | | | | | | | There are no more modular users providing a posix clock. The register function is now pointless so the posix clock array can be initialized statically at compile time and the array including the various k_clock structs can be marked 'const'. Inspired by changes in the Grsecurity patch set, but done proper. [ tglx: Massaged changelog and fixed the POSIX_TIMER=n case ] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mike Travis <mike.travis@hpe.com> Cc: Dimitri Sivanich <sivanich@hpe.com> Link: http://lkml.kernel.org/r/20170526090311.3377-3-hch@lst.de
* time: Change k_clock nsleep() to use timespec64Deepa Dinamani2017-04-141-4/+6
| | | | | | | | | | | | | | | | | | struct timespec is not y2038 safe on 32 bit machines. Replace uses of struct timespec with struct timespec64 in the kernel. The syscall interfaces themselves will be changed in a separate series. Note that the restart_block parameter for nanosleep has also been left unchanged and will be part of syscall series noted above. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: y2038@lists.linaro.org Cc: john.stultz@linaro.org Cc: arnd@arndb.de Link: http://lkml.kernel.org/r/1490555058-4603-8-git-send-email-deepa.kernel@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* time: Change k_clock timer_set() and timer_get() to use timespec64Deepa Dinamani2017-04-141-16/+21
| | | | | | | | | | | | | | | | | | struct timespec is not y2038 safe on 32 bit machines. Replace uses of struct timespec with struct timespec64 in the kernel. struct itimerspec internally uses struct timespec. Use struct itimerspec64 which uses struct timespec64. The syscall interfaces themselves will be changed in a separate series. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: y2038@lists.linaro.org Cc: john.stultz@linaro.org Cc: arnd@arndb.de Link: http://lkml.kernel.org/r/1490555058-4603-7-git-send-email-deepa.kernel@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* time: Change k_clock clock_set() to use timespec64Deepa Dinamani2017-04-141-6/+5
| | | | | | | | | | | | | | | struct timespec is not y2038 safe on 32 bit machines. Replace uses of struct timespec with struct timespec64 in the kernel. The syscall interfaces themselves will be changed in a separate series. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: y2038@lists.linaro.org Cc: john.stultz@linaro.org Cc: arnd@arndb.de Link: http://lkml.kernel.org/r/1490555058-4603-6-git-send-email-deepa.kernel@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* time: Change k_clock clock_getres() to use timespec64Deepa Dinamani2017-04-141-4/+6
| | | | | | | | | | | | | | | | | | | struct timespec is not y2038 safe on 32 bit machines. Replace uses of struct timespec with struct timespec64 in the kernel. The syscall interfaces themselves will be changed in a separate series. The clock_getres() interface has also been changed to use timespec64 even though this particular interface is not affected by the y2038 problem. This helps verification for internal kernel code for y2038 readiness by getting rid of time_t/ timeval/ timespec completely. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: y2038@lists.linaro.org Cc: john.stultz@linaro.org Cc: arnd@arndb.de Link: http://lkml.kernel.org/r/1490555058-4603-5-git-send-email-deepa.kernel@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* time: Change k_clock clock_get() to use timespec64Deepa Dinamani2017-04-141-15/+17
| | | | | | | | | | | | | | | struct timespec is not y2038 safe on 32 bit machines. Replace uses of struct timespec with struct timespec64 in the kernel. The syscall interfaces themselves will be changed in a separate series. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: y2038@lists.linaro.org Cc: john.stultz@linaro.org Cc: arnd@arndb.de Link: http://lkml.kernel.org/r/1490555058-4603-4-git-send-email-deepa.kernel@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* time: Delete do_sys_setimeofday()Deepa Dinamani2017-04-141-1/+4
| | | | | | | | | | | | | | | | | | struct timespec is not y2038 safe on 32 bit machines and needs to be replaced with struct timespec64. do_sys_timeofday() is just a wrapper function. Replace all calls to this function with direct calls to do_sys_timeofday64() instead and delete do_sys_timeofday(). Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: y2038@lists.linaro.org Cc: john.stultz@linaro.org Cc: arnd@arndb.de Cc: linux-alpha@vger.kernel.org Link: http://lkml.kernel.org/r/1490555058-4603-2-git-send-email-deepa.kernel@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* sched/headers: Prepare to move exit_files() and exit_itimers() from ↵Ingo Molnar2017-03-021-0/+1
| | | | | | | | | | | | | <linux/sched.h> to <linux/sched/task.h> But first update the usage site. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* ktime: Cleanup ktime_set() usageThomas Gleixner2016-12-251-1/+1
| | | | | | | | | | ktime_set(S,N) was required for the timespec storage type and is still useful for situations where a Seconds and Nanoseconds part of a time value needs to be converted. For anything where the Seconds argument is 0, this is pointless and can be replaced with a simple assignment. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org>
* ktime: Get rid of the unionThomas Gleixner2016-12-251-10/+10
| | | | | | | | | | | | | | | ktime is a union because the initial implementation stored the time in scalar nanoseconds on 64 bit machine and in a endianess optimized timespec variant for 32bit machines. The Y2038 cleanup removed the timespec variant and switched everything to scalar nanoseconds. The union remained, but become completely pointless. Get rid of the union and just keep ktime_t as simple typedef of type s64. The conversion was done with coccinelle and some manual mopping up. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org>
* Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds2016-12-241-1/+1
| | | | | | | | | | | | | This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES properThomas Gleixner2016-01-171-1/+1
| | | | | | | | | | | | | | | | | As Helge reported for timerfd we have the same issue in posix timers. We return remaining time larger than the programmed relative time to user space in case of CONFIG_TIME_LOW_RES=y. Use the proper function to adjust the extra time added in hrtimer_start_range_ns(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Helge Deller <deller@gmx.de> Cc: John Stultz <john.stultz@linaro.org> Cc: linux-m68k@lists.linux-m68k.org Cc: dhowells@redhat.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20160114164159.450510905@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* hrtimer: Get rid of hrtimer_get_res()Thomas Gleixner2015-04-221-5/+12
| | | | | | | | | | | | | | | | | | The resolution is directly accessible now. So its simpler just to fill in the values of the timespec and be done with it. Text size reduction (combined with "hrtimer: Get rid of the resolution field in hrtimer_clock_base"): x8664 -61, i386 -221, ARM -60, power64 -48 Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20150414203500.879888080@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* posix-timers: Fix stack info leak in timer_create()Mathias Krause2014-10-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | If userland creates a timer without specifying a sigevent info, we'll create one ourself, using a stack local variable. Particularly will we use the timer ID as sival_int. But as sigev_value is a union containing a pointer and an int, that assignment will only partially initialize sigev_value on systems where the size of a pointer is bigger than the size of an int. On such systems we'll copy the uninitialized stack bytes from the timer_create() call to userland when the timer actually fires and we're going to deliver the signal. Initialize sigev_value with 0 to plug the stack info leak. Found in the PaX patch, written by the PaX Team. Fixes: 5a9fa7307285 ("posix-timers: kill ->it_sigev_signo and...") Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Brad Spengler <spender@grsecurity.net> Cc: PaX Team <pageexec@freemail.hu> Cc: <stable@vger.kernel.org> # v2.6.28+ Link: http://lkml.kernel.org/r/1412456799-32339-1-git-send-email-minipli@googlemail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* time: Consolidate the time accessor prototypesThomas Gleixner2014-07-231-0/+2
| | | | | | | | | Right now we have time related prototypes in 3 different header files. Move it to a single timekeeping header file and move the core internal stuff into a core private header. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
* time/timers: Move all time(r) related files into kernel/timeThomas Gleixner2014-06-231-0/+1121
Except for Kconfig.HZ. That needs a separate treatment. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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