- 21 Feb, 2011 1 commit
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John Stultz authored
The hrtimer code is written mainly with CLOCK_REALTIME and CLOCK_MONOTONIC in mind. These are clockids 0 and 1 resepctively. However, if we are to introduce any new hrtimer bases, using new clockids, we have to skip the cputimers (clockids 2,3) as well as other clockids that may not impelement timers. This patch adds a little bit of indirection between the clockid and the base, so that we can extend the base by one when we add a new clockid at number 7 or so. CC: Jamie Lokier <jamie@shareable.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Alexander Shishkin <virtuoso@slind.org> CC: Arve Hjønnevåg <arve@android.com> Signed-off-by:John Stultz <john.stultz@linaro.org>
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- 18 Feb, 2011 1 commit
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Richard Cochran authored
The ADJ_SETOFFSET code redundantly checks the range of the nanoseconds field of the time value. This field is checked again in the subsequent call to timekeeping_inject_offset(). Also, as is, the check will not detect whether the number of microseconds is out of range. Let timekeeping_inject_offset() do the error checking. Signed-off-by:
Richard Cochran <richard.cochran@omicron.at> Cc: johnstul@us.ibm.com LKML-Reference: <20110218090724.GA2924@riccoc20.at.omicron.at> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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- 09 Feb, 2011 1 commit
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Torben Hohn authored
Only one CPU gets the timer interrupt so mn10300_last_tsc does not need to be protected by xtime lock. Remove xtime lovking and use xtime_update() which does the locking itself. Signed-off-by:
Torben Hohn <torbenh@gmx.de> Cc: David Howells <dhowells@redhat.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> LKML-Reference: <20110127150011.23248.62040.stgit@localhost> Signed-off-by:
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- 02 Feb, 2011 30 commits
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Richard Cochran authored
This patch adds support for adding and removing posix clocks. The clock lifetime cycle is patterned after usb devices. Each clock is represented by a standard character device. In addition, the driver may optionally implement custom character device operations. The posix clock and timer system calls listed below now work with dynamic posix clocks, as well as the traditional static clocks. The following system calls are affected: - clock_adjtime (brand new syscall) - clock_gettime - clock_getres - clock_settime - timer_create - timer_delete - timer_gettime - timer_settime [ tglx: Adapted to the posix-timer cleanup. Moved clock_posix_dynamic to posix-clock.c and made all referenced functions static ] Signed-off-by:
John Stultz <johnstul@us.ibm.com> LKML-Reference: <20110201134420.164172635@linutronix.de> Signed-off-by:
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Thomas Gleixner authored
Rename register_posix_clock() to posix_timers_register_clock(). That's what the function really does. As a side effect this cleans up the posix_clock namespace for the upcoming dynamic posix_clock infrastructure. Signed-off-by:
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Richard Cochran authored
Extend the negative clockids which are currently used by posix cpu timers to encode the PID with a file descriptor based type which encodes the fd in the upper bits. Originally-from: Richard Cochran <richard.cochran@omicron.at> Signed-off-by:
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Richard Cochran authored
This patch adds the clock_adjtime system call to the x86 architecture. Signed-off-by:
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Richard Cochran authored
A new syscall is introduced that allows tuning of a POSIX clock. The new call, clock_adjtime, takes two parameters, the clock ID and a pointer to a struct timex. Any ADJTIMEX(2) operation may be requested via this system call, but various POSIX clocks may or may not support tuning. [ tglx: Adapted to the posix-timer cleanup series. Avoid copy_to_user in the error case ] Signed-off-by:
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Richard Cochran authored
Split out the compat timex accessors into separate functions. Preparatory patch for a new syscall. [ tglx: Split that patch from Richards "posix-timers: Introduce a syscall for clock tuning.". Keeps the changes strictly separate ] Originally-from: Richard Cochran <richardcochran@gmail.com> Acked-by:
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Richard Cochran authored
This patch adds a new mode bit into the timex structure. When set, the bit instructs the kernel to add the given time value to the current time. Signed-off-by:
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John Stultz authored
This adds a kernel-internal timekeeping interface to add or subtract a fixed amount from CLOCK_REALTIME. This makes it so kernel users or interfaces trying to do so do not have to read the time, then add an offset and then call settimeofday(), which adds some extra error in comparision to just simply adding the offset in the kernel timekeeping core. Signed-off-by:
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Richard Cochran authored
Pick the cleanup to the comment in posix-timers.c from Richards all in one conversion patch. Originally-from: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Thomas Gleixner authored
All functions are accessed via clock_posix_cpu now. So make them static. Signed-off-by:
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Thomas Gleixner authored
All users gone. Remove the cruft. Huge thanks to Richard Cochran who tackled that maze first. Signed-off-by:
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Thomas Gleixner authored
Set the common function for CLOCK_MONOTONIC and CLOCK_REALTIME kclocks and use the new decoding function. Signed-off-by:
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Thomas Gleixner authored
Set the common function for CLOCK_MONOTONIC and CLOCK_REALTIME kclocks and use the new decoding function. Signed-off-by:
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Thomas Gleixner authored
Set the common function for CLOCK_MONOTONIC and CLOCK_REALTIME kclocks and use the new decoding function. Signed-off-by:
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Thomas Gleixner authored
Setup timer_create for CLOCK_MONOTONIC and CLOCK_REALTIME kclocks and remove the no_timer_create() implementation. Signed-off-by:
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Thomas Gleixner authored
The res member of kclock is only used by mmtimer.c, but even there it contains redundant information. Remove the field and fixup mmtimer. Signed-off-by:
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Thomas Gleixner authored
Use the new kclock decoding. Fixup the fallout in mmtimer.c Signed-off-by:
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Thomas Gleixner authored
Richard said: "I would think that we can require k_clocks to provide the read function. This could be checked and enforced in register_posix_clock()." Add checks for clock_getres and clock_get in the register function. Suggested-by:
Richard Cochran <richardcochran@gmail.com> Cc: John Stultz <johnstul@us.ibm.com> Signed-off-by:
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Thomas Gleixner authored
Use the new kclock decoding mechanism and rename the misnomed common_clock_get() to posix_clock_realtime_get(). Signed-off-by:
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Thomas Gleixner authored
Use the new kclock decoding function in clock_settime and cleanup all kclocks which use the default functions. Rename the misnomed common_clock_set() to posix_clock_realtime_set(). Signed-off-by:
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Thomas Gleixner authored
CLOCK_THREAD_CPUTIME_ID implements stub functions for nanosleep and nanosleep_restart, which return -EINVAL. That return value is wrong. The correct return value is -ENOTSUP. Remove the stubs and let the new dispatch code return the correct error code. Signed-off-by:
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Thomas Gleixner authored
posix timers were the last users of the legacy arg0-3 members of restart_block. Remove the cruft. Signed-off-by:
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Thomas Gleixner authored
posix timers still use the legacy arg0-arg3 members of restart_block. Use restart_block.nanosleep instead Signed-off-by:
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Thomas Gleixner authored
Use the new kclock decoding function in clock_nanosleep_restart. Signed-off-by:
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Thomas Gleixner authored
Use the new kclock decoding function in clock_nanosleep and cleanup all kclocks which use the default functions. Signed-off-by:
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Thomas Gleixner authored
New function to find the kclock for a given clockid. Returns a pointer to clock_posix_cpu if clockid < 0. If clockid >= MAXCLOCK or if the clock_getres pointer is not set it returns NULL. For valid clocks it returns a pointer to the matching posix_clock. Signed-off-by:
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Thomas Gleixner authored
The CLOCK_DISPATCH() macro is a horrible magic. We call common functions if a function pointer is not set. That's just backwards. To support dynamic file decriptor based clocks we need to cleanup that dispatch logic. Create a k_clock struct clock_posix_cpu which has all the posix-cpu-timer functions filled in. After the cleanup the functions can be made static. Signed-off-by:
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Thomas Gleixner authored
Cosmetic. No functional change Signed-off-by:
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Thomas Gleixner authored
Define the conditional nanosleep not supported error value outside of do_posix_clock_nonanosleep(). Preparatory patch for further cleanups. Signed-off-by:
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Richard Cochran authored
Both settimeofday() and clock_settime() promise with a 'const' attribute not to alter the arguments passed in. This patch adds the missing 'const' attribute into the various kernel functions implementing these calls. Signed-off-by:
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- 01 Feb, 2011 1 commit
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Thomas Gleixner authored
The xtime/dotimer cleanup broke architectures which do not implement clockevents. Time to send out another __do_IRQ threat. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Torben Hohn <torbenh@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: johnstul@us.ibm.com Cc: yong.zhang0@gmail.com Cc: hch@infradead.org LKML-Reference: <20110127145905.23248.30458.stgit@localhost> Signed-off-by:
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- 31 Jan, 2011 6 commits
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Torben Hohn authored
All callers of do_timer() are converted to xtime_update(). The only users of xtime_lock are in kernel/time/. Make both local to kernel/time/ and remove them from the global header files. [ tglx: Reuse tick-internal.h instead of creating another local header file. Massaged changelog ] Signed-off-by:
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Torben Hohn authored
xtime_update() takes the xtime_lock itself. set_linux_timer() does not need to be protected by xtime_lock. [ tglx: This code is broken on SMP anyway. ] Signed-off-by:
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Torben Hohn authored
xtime_update() takes the xtime_lock itself. pcic_clear_clock_irq() and clear_clock_irq do not need to be protected by xtime_lock. Signed-off-by:
David S. Miller <davem@davemloft.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: johnstul@us.ibm.com Cc: hch@infradead.org Cc: yong.zhang0@gmail.com LKML-Reference: <20110127150022.23248.80369.stgit@localhost> Signed-off-by:
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Torben Hohn authored
xtime_update() takes the xtime_lock itself. Signed-off-by:
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Torben Hohn authored
xtime_update() properly takes the xtime_lock Signed-off-by:
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Torben Hohn authored
xtime_update() does proper locking. Signed-off-by:
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