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d08de0c19c
linux-kernel-test/drivers/cpufreq
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Afzal Mohammed d08de0c19c [CPUFREQ] update lpj only if frequency has changed 
During scaling up of cpu frequency, loops_per_jiffy
is updated upon invoking PRECHANGE notifier.
If setting to new frequency fails in cpufreq driver,
lpj is left at incorrect value.

Hence update lpj only if cpu frequency is changed,
i.e. upon invoking POSTCHANGE notifier.

Penalty would be that during time period between
changing cpu frequency & invocation of POSTCHANGE
notifier, udelay(x) may not gurantee minimal delay
of 'x' us for frequency scaling up operation.

Perhaps a better solution would be to define
CPUFREQ_ABORTCHANGE & handle accordingly, but then
it would be more intrusive (using ABORTCHANGE may
help drivers also; if any has registered notifier
and expect POST for a PRECHANGE, their needs can
be taken care using ABORT)

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2012-01-06 10:10:53 -05:00
..
acpi-cpufreq.c [CPUFREQ] Handle CPUs with different capabilities in acpi-cpufreq 2011-07-13 18:29:49 -04:00
cpufreq_conservative.c nohz: Fix update_ts_time_stat idle accounting 2011-09-08 11:10:55 +02:00
cpufreq_ondemand.c [CPUFREQ] Remove wall variable from cpufreq_gov_dbs_init() 2011-12-09 10:40:23 -05:00
cpufreq_performance.c [CPUFREQ] use dynamic debug instead of custom infrastructure 2011-05-04 11:50:57 -04:00
cpufreq_powersave.c [CPUFREQ] use dynamic debug instead of custom infrastructure 2011-05-04 11:50:57 -04:00
cpufreq_stats.c cpufreq: cpufreq_stats.c is a module, and should include module.h 2011-10-31 19:31:31 -04:00
cpufreq_userspace.c [CPUFREQ] cpufreq:userspace: fix cpu_cur_freq updation 2012-01-06 10:10:53 -05:00
cpufreq-nforce2.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
cpufreq.c [CPUFREQ] update lpj only if frequency has changed 2012-01-06 10:10:53 -05:00
db8500-cpufreq.c [CPUFREQ] db8500: fix build error due to undeclared i variable 2011-11-11 22:28:33 -05:00
e_powersaver.c [CPUFREQ] e_powersaver: Allow user to lower maximum voltage 2011-10-26 17:19:46 -04:00
elanfreq.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
exynos4210-cpufreq.c [CPUFREQ] EXYNOS4210: cpufreq code is changed for stable working 2011-12-09 10:38:02 -05:00
freq_table.c [CPUFREQ] use dynamic debug instead of custom infrastructure 2011-05-04 11:50:57 -04:00
gx-suspmod.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
Kconfig Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-07-25 22:59:39 -07:00
Kconfig.arm [CPUFREQ] Move compile for S3C64XX cpufreq to /drivers/cpufreq 2011-07-13 18:29:53 -04:00
Kconfig.powerpc powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards 2011-07-19 15:13:04 +10:00
Kconfig.x86 Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 17:55:12 -07:00
longhaul.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
longhaul.h [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
longrun.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
Makefile cpufreq: OMAP: cleanup for multi-SoC support, move into drivers/cpufreq 2011-11-08 11:42:16 -08:00
maple-cpufreq.c powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards 2011-07-19 15:13:04 +10:00
mperf.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
mperf.h [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
omap-cpufreq.c cpufreq: OMAP: fixup for omap_device changes, include <linux/module.h> 2011-11-10 10:11:20 -08:00
p4-clockmod.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
pcc-cpufreq.c drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference 2011-09-14 18:09:38 -07:00
powernow-k6.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
powernow-k7.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
powernow-k7.h [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
powernow-k8.c [CPUFREQ] powernow-k8: Don't try to transition if the pstate is incorrect 2011-06-16 16:31:13 -04:00
powernow-k8.h [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
s3c64xx-cpufreq.c [CPUFREQ] s3c64xx: Use pr_fmt() for consistent log messages 2011-12-09 10:38:01 -05:00
s5pv210-cpufreq.c [CPUFREQ] s5pv210: make needlessly global symbols static 2011-07-13 18:30:00 -04:00
sc520_freq.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
speedstep-centrino.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
speedstep-ich.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
speedstep-lib.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
speedstep-lib.h [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00
speedstep-smi.c [CPUFREQ] Move x86 drivers to drivers/cpufreq/ 2011-05-19 18:51:07 -04:00