linux-toradex.git/arch/s390/kernel/time.c, branch v2.6.25.17

[S390] idle: Fix machine check handling in idle loop.

2008-03-05T11:37:17+00:00

If a machine check handling is pending when the idle loop is entered
default_idle will be left with timer ticks and virtual timer disabled.
Fix this by "calling" the idle_chain. Also a BUG_ON(!in_interrupt) in
start_hz_timer must be removed since the function now gets called from
non interrupt context as well.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] etr: fix compile error on !SMP

2008-02-19T14:29:34+00:00

Since a5fbb6d1064be885d2a6b82f625186753cf74848
"KVM: fix !SMP build error" smp_call_function isn't a define anymore
that folds into nothing but a define that calls up_smp_call_function
with all parameters. Hence we cannot #ifdef out the unused code
anymore...
This seems to be the preferred method, so do this for s390 as well.

arch/s390/kernel/time.c: In function 'etr_sync_clock':
arch/s390/kernel/time.c:825: error: 'clock_sync_cpu_start' undeclared
arch/s390/kernel/time.c:862: error: 'clock_sync_cpu_end' undeclared

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

Driver core: change sysdev classes to use dynamic kobject names

2008-01-25T04:40:40+00:00

All kobjects require a dynamically allocated name now. We no longer
need to keep track if the name is statically assigned, we can just
unconditionally free() all kobject names on cleanup.

Signed-off-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

sched: restore deterministic CPU accounting on powerpc

2007-11-09T21:39:38+00:00

Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the
deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been
broken on powerpc, because we end up counting user time twice: once in
timer_interrupt() and once in update_process_times().

This fixes the problem by pulling the code in update_process_times
that updates utime and stime into a separate function called
account_process_tick.  If CONFIG_VIRT_CPU_ACCOUNTING is not defined,
there is a version of account_process_tick in kernel/timer.c that
simply accounts a whole tick to either utime or stime as before.  If
CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to
implement account_process_tick.

This also lets us simplify the s390 code a bit; it means that the s390
timer interrupt can now call update_process_times even when
CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a
suitable account_process_tick().

account_process_tick() now takes the task_struct * as an argument.
Tested both with and without CONFIG_VIRT_CPU_ACCOUNTING.

Signed-off-by: Paul Mackerras 
Signed-off-by: Ingo Molnar

[S390] tod clock: announce clocksource as perfect

2007-11-05T10:10:18+00:00

The Time of Day clock is the standard time source for s390. It is
- monotonic
- allows very fast reading
- architecture guarantees at least microsecond stepping
- available as part of the architecture

We should announce the rate of tod as 400 to be in sync with the
description found in clocksource.h:
"400-499:Perfect The ideal clocksource. A must-use where available."

This change will prefer tod over less reliable clock sources.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Martin Schwidefsky

[S390] s390: rename CPU_IDLE to S390_CPU_IDLE

2007-07-10T09:24:53+00:00

sched-cfs-v2.6.22-git-v18.patch introduces CPU_IDLE in sched.h.
This conflict with the already existing define in
include/asm-s390/processor.h
Just rename the s390 defines, since they will go away as soon as
we support CONFIG_NO_HZ instead of our own CONFIG_NO_IDLE_HZ.

Signed-off-by: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Ingo Molnar 
Signed-off-by: Martin Schwidefsky

needs to include

2007-05-08T18:15:05+00:00

sysdev.h uses THIS_MODULE so should include .

[akpm@linux-foundation.org: couple of fixes]
Signed-off-by: Ralf Baechle 
Cc: Andi Kleen 
Cc: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[S390] Switch etr from tasklet to workqueue.

2007-04-27T14:01:47+00:00

The clock synchronization of the ETR code requires an smp_call_function
to synchronize all cpus. Calling smp_call_function from a tasklet is
illegal. Replace the tasklet with a job on the global workqueue.
ETR work is rare and can be postponed to a be done by a kernel thread.

Signed-off-by: Martin Schwidefsky

[S390] etr: Add barrier() to etr_sync_cpu_start().

2007-02-21T09:55:15+00:00

Force reading of *in_sync in while loop. Loops where the content that
is checked for is changed by a different cpu always should have some
sort of barrier() semantics.
Otherwise this might lead to very subtle bugs.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[PATCH] clocksource: fixup is_continous changes on S390

2007-02-16T16:13:57+00:00

Fixup the is_contionous replacement by a flag field.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar 
Cc: Martin Schwidefsky 
Cc: john stultz 
Cc: Roman Zippel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds