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cfc80b6829
linux/kernel
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Thomas Gleixner cfc80b6829 clocksource: Provide a generic mult/shift factor calculation 
MIPS has two functions to calculcate the mult/shift factors for clock
sources and clock events at run time. ARM needs such functions as
well.

Implement a function which calculates the mult/shift factors based on
the frequencies to which and from which is converted. The function
also has a parameter to specify the minimum conversion range in
seconds. This range is guaranteed not to produce a 64bit overflow when
a value is multiplied with the calculated mult factor. The larger the
conversion range the less becomes the conversion accuracy.

Provide two inline wrappers which handle clock events and clock
sources. For clock events the "from" frequency is nano seconds per
second which corresponds to 1GHz and "to" is the device frequency. For
clock sources "from" is the device frequency and "to" is nano seconds
per second.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Mikael Pettersson <mikpe@it.uu.se>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20091111134229.766673305@linutronix.de>
2011-03-11 12:46:18 +08:00
..
gcov gcov: fix null-pointer dereference for certain module types 2010-09-20 13:17:53 -07:00
irq irq: Add new IRQ flag IRQF_NO_SUSPEND 2010-08-13 13:19:50 -07:00
power Merge remote branch 'linux-2.6.32.y/master' into develop 2011-02-13 10:25:30 +08:00
time clocksource: Provide a generic mult/shift factor calculation 2011-03-11 12:46:18 +08:00
trace tracing: Fix panic when lseek() called on "trace" opened for writing 2011-01-07 14:43:10 -08:00
.gitignore
acct.c bsdacct: fix uid/gid misreporting 2009-12-18 14:03:52 -08:00
async.c async: Fix lack of boot-time console due to insufficient synchronization 2009-06-08 12:31:53 -07:00
audit_tree.c fix more leaks in audit_tree.c tag_chunk() 2010-01-18 10:19:50 -08:00
audit_watch.c Audit: reorganize struct audit_watch to save 8 bytes 2009-09-24 03:50:25 -04:00
audit.c Audit: send signal info if selinux is disabled 2009-09-24 03:50:26 -04:00
audit.h Fix rule eviction order for AUDIT_DIR 2009-06-24 00:02:38 -04:00
auditfilter.c Audit: clean up all op= output to include string quoting 2009-06-24 00:00:52 -04:00
auditsc.c Audit: rearrange audit_context to save 16 bytes per struct 2009-09-24 03:50:26 -04:00
backtracetest.c
bounds.c
capability.c
cgroup_freezer.c Merge remote branch 'linux-2.6.32.y/master' into develop 2010-12-16 20:54:24 +08:00
cgroup.c Merge commit 'v2.6.32.9' into android-2.6.32 2010-03-10 16:38:33 -08:00
compat.c compat: Make compat_alloc_user_space() incorporate the access_ok() 2010-09-20 13:17:57 -07:00
configs.c
cpu.c sched: _cpu_down(): Don't play with current->cpus_allowed 2010-09-20 13:18:08 -07:00
cpuset.c Merge remote branch 'linux-2.6.32.y/master' into develop 2010-12-16 20:54:24 +08:00
cred-internals.h
cred.c CRED: Fix a race in creds_are_invalid() in credentials debugging 2010-05-12 14:57:10 -07:00
delayacct.c headers: taskstats_kern.h trim 2009-09-18 09:48:52 -07:00
dma.c
exec_domain.c Get rid of indirect include of fs_struct.h 2009-03-31 23:00:27 -04:00
exit.c posix-cpu-timers: workaround to suppress the problems with mt exec 2011-01-07 14:43:19 -08:00
extable.c Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-05 11:04:19 -07:00
fork.c Merge remote branch 'linux-2.6.32.y/master' into develop 2010-12-16 20:54:24 +08:00
freezer.c sched: fix nr_uninterruptible accounting of frozen tasks really 2009-07-18 14:19:53 +02:00
futex_compat.c futex: Fix compat_futex to be same as futex for REQUEUE_PI 2009-08-10 15:41:12 +02:00
futex.c Merge remote branch 'linux-2.6.32.y/master' into develop 2010-12-16 20:54:24 +08:00
groups.c kernel/groups.c: fix integer overflow in groups_search 2010-09-20 13:17:54 -07:00
hrtimer.c hrtimer: Preserve timer state in remove_hrtimer() 2010-10-28 21:44:01 -07:00
hung_task.c sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
itimer.c itimers: Add tracepoints for itimer 2009-08-29 14:10:07 +02:00
kallsyms.c kallsyms: use new arch_is_kernel_text() 2009-09-23 07:39:30 -07:00
Kconfig.freezer
Kconfig.hz
Kconfig.preempt
kexec.c kexec: fix omitting offset in extended crashkernel syntax 2009-07-29 19:10:34 -07:00
kfifo.c kfifo: Use "const" definitions 2009-09-19 13:13:17 -07:00
kgdb.c sysrq, intel_fb: fix sysrq g collision 2009-05-15 07:56:24 -05:00
kmod.c Revert "kmod: fix race in usermodehelper code" 2009-09-23 18:12:10 -07:00
kprobes.c const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
ksysfs.c
kthread.c cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node 2010-04-01 15:58:46 -07:00
latencytop.c latencytop: fix per task accumulator 2010-12-09 13:26:51 -08:00
lockdep_internals.h lockdep: BFS cleanup 2009-07-24 10:53:29 +02:00
lockdep_proc.c seq_file: constify seq_operations 2009-09-23 07:39:29 -07:00
lockdep_states.h
lockdep.c Revert "lockdep: fix incorrect percpu usage" 2010-06-01 09:45:46 -07:00
Makefile SLOW_WORK: Move slow_work's proc file to debugfs 2009-12-01 08:20:31 -08:00
module.c dynamic debug: move ddebug_remove_module() down into free_module() 2010-08-02 10:20:47 -07:00
mutex-debug.c headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
mutex-debug.h
mutex.c mutex: Fix optimistic spinning vs. BKL 2010-07-05 11:10:31 -07:00
mutex.h
notifier.c
ns_cgroup.c cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time 2009-09-24 07:20:58 -07:00
nsproxy.c nsproxy: extract create_nsproxy() 2009-06-18 13:03:56 -07:00
panic.c Add build option to to set the default panic timeout. 2010-02-03 21:26:57 -08:00
params.c param: fix setting arrays of bool 2009-10-29 08:56:20 +10:30
perf_event.c Fix racy use of anon_inode_getfd() in perf_event.c 2010-07-05 11:10:30 -07:00
pid_namespace.c pidns: deny CLONE_PARENT|CLONE_NEWPID combination 2009-09-24 07:21:04 -07:00
pid.c mm: also use alloc_large_system_hash() for the PID hash table 2009-09-22 07:17:38 -07:00
pm_qos_params.c
posix-cpu-timers.c itimers: Add tracepoints for itimer 2009-08-29 14:10:07 +02:00
posix-timers.c posix_timer: Fix error path in timer_create 2010-07-05 11:10:30 -07:00
printk.c Merge remote branch 'linux-2.6.32.y/master' into develop 2011-02-13 10:25:30 +08:00
profile.c profile: fix stats and data leakage 2010-05-26 14:29:18 -07:00
ptrace.c ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee 2009-09-24 07:20:59 -07:00
rcupdate.c rcu: Move rcu_barrier() to rcutree 2009-10-07 08:11:20 +02:00
rcutorture.c rcu: Clean up code to address Ingo's checkpatch feedback 2009-09-23 19:46:30 +02:00
rcutree_plugin.h rcu: Remove inline from forward-referenced functions 2009-12-18 14:03:04 -08:00
rcutree_trace.c rcu: Make hot-unplugged CPU relinquish its own RCU callbacks 2009-10-07 08:11:20 +02:00
rcutree.c rcu: Fix note_new_gpnum() uses of ->gpnum 2009-12-18 14:03:01 -08:00
rcutree.h rcu: Remove inline from forward-referenced functions 2009-12-18 14:03:04 -08:00
relay.c const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
res_counter.c memcg: some modification to softlimit under hierarchical memory reclaim. 2009-10-01 16:11:13 -07:00
resource.c walk system ram range 2009-09-23 07:39:41 -07:00
rtmutex_common.h rt_mutex: add proxy lock routines 2009-04-06 11:14:02 +02:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c rtmutex: Avoid deadlock in rt_mutex_start_proxy_lock() 2009-08-06 05:50:21 +02:00
rtmutex.h
rwsem.c
sched_clock.c sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK 2010-01-22 15:18:30 -08:00
sched_cpupri.c sched: Add new prio to cpupri before removing old prio 2009-08-02 14:26:09 +02:00
sched_cpupri.h cpumask: remove cpumask_t from core 2009-03-30 22:05:17 +10:30
sched_debug.c sched: Remove forced2_migrations stats 2010-09-20 13:17:59 -07:00
sched_fair.c sched: Fix select_idle_sibling() logic in select_task_rq_fair() 2010-09-20 13:18:12 -07:00
sched_features.h sched: Add new wakeup preemption mode: WAKEUP_RUNNING 2009-09-17 10:17:25 +02:00
sched_idletask.c sched: Fix TASK_WAKING vs fork deadlock 2010-09-20 13:18:09 -07:00
sched_rt.c sched: Fix TASK_WAKING vs fork deadlock 2010-09-20 13:18:09 -07:00
sched_stats.h
sched.c Merge remote branch 'linux-2.6.32.y/master' into develop 2010-12-16 20:54:24 +08:00
seccomp.c
semaphore.c
signal.c signals: check_kill_permission(): don't check creds if same_thread_group() 2010-07-05 11:10:56 -07:00
slow-work-debugfs.c SLOW_WORK: Move slow_work's proc file to debugfs 2009-12-01 08:20:31 -08:00
slow-work.c slow-work: use get_ref wrapper instead of directly calling get_ref 2010-08-10 10:20:45 -07:00
slow-work.h SLOW_WORK: Move slow_work's proc file to debugfs 2009-12-01 08:20:31 -08:00
smp.c cpumask: remove arch_send_call_function_ipi 2009-09-24 09:34:47 +09:30
softirq.c softirq: add BLOCK_IOPOLL to softirq_to_name 2009-09-17 15:53:44 -04:00
softlockup.c softlockup: Stop spurious softlockup messages due to overflow 2010-04-01 15:58:47 -07:00
spinlock.c locking: Allow arch-inlined spinlocks 2009-08-31 18:08:50 +02:00
srcu.c
stacktrace.c
stop_machine.c cpumask: remove cpumask_t from core 2009-03-30 22:05:17 +10:30
sys_ni.c Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-09-24 15:13:11 -07:00
sys.c Merge remote branch 'linux-2.6.32.y/master' into develop 2010-12-16 20:54:24 +08:00
sysctl_check.c NET: fix oops at bootime in sysctl code 2010-02-09 04:51:02 -08:00
sysctl.c Merge commit 'v2.6.32.9' into android-2.6.32 2010-03-10 16:38:33 -08:00
taskstats.c genetlink: make netns aware 2009-07-12 14:03:27 -07:00
test_kprobes.c
time.c time: Prevent 32 bit overflow with set_normalized_timespec() 2009-09-15 10:17:30 +02:00
timeconst.pl
timer.c nohz: Fix get_next_timer_interrupt() vs cpu hotplug 2011-01-07 14:43:03 -08:00
tracepoint.c trivial: fix typo "to to" in multiple files 2009-09-21 15:14:55 +02:00
tsacct.c
uid16.c headers: utsname.h redux 2009-09-23 18:13:10 -07:00
up.c
user_namespace.c
user.c uids: Prevent tear down race 2009-11-02 16:02:39 +01:00
utsname_sysctl.c sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
utsname.c utsns: extract creeate_uts_ns() 2009-06-18 13:03:55 -07:00
wait.c locking, sched: Give waitqueue spinlocks their own lockdep classes 2009-08-10 14:43:09 +02:00
workqueue.c workqueue: fix race condition in schedule_on_each_cpu() 2009-11-17 17:40:33 -08:00