Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Rafael J. Wysocki 559ed40752 cpufreq: Avoid attempts to create duplicate symbolic links ... After commit 87549141d5 (cpufreq: Stop migrating sysfs files on hotplug) there is a problem with CPUs that share cpufreq policy objects with other CPUs and are initially offline. Say CPU1 shares a policy with CPU0 which is online and is registered first. As part of the registration process, cpufreq_add_dev() is called for it. It creates the policy object and a symbolic link to it from the CPU1's sysfs directory. If CPU1 is registered subsequently and it is offline at that time, cpufreq_add_dev() will attempt to create a symbolic link to the policy object for it, but that link is present already, so a warning about that will be triggered. To avoid that warning, make cpufreq use an additional CPU mask containing related CPUs that are actually present for each policy object. That mask is initialized when the policy object is populated after its creation (for the first online CPU using it) and it includes CPUs from the "policy CPUs" mask returned by the cpufreq driver's ->init() callback that are physically present at that time. Symbolic links to the policy are created only for the CPUs in that mask. If cpufreq_add_dev() is invoked for an offline CPU, it checks the new mask and only creates the symlink if the CPU was not in it (the CPU is added to the mask at the same time). In turn, cpufreq_remove_dev() drops the given CPU from the new mask, removes its symlink to the policy object and returns, unless it is the CPU owning the policy object. In that case, the policy object is moved to a new CPU's sysfs directory or deleted if the CPU being removed was the last user of the policy. While at it, notice that cpufreq_remove_dev() can't fail, because its return value is ignored, so make it ignore return values from __cpufreq_remove_dev_prepare() and __cpufreq_remove_dev_finish() and prevent these functions from aborting on errors returned by __cpufreq_governor(). Also drop the now unused sif argument from them. Fixes: 87549141d5 (cpufreq: Stop migrating sysfs files on hotplug) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reported-and-tested-by: Russell King <linux@arm.linux.org.uk> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>		2015-07-28 17:19:26 +02:00
..
acpi-cpufreq.c	acpi-cpufreq: Replace cpu_**_mask() with topology_**_cpumask()	2015-05-27 15:22:16 +02:00
amd_freq_sensitivity.c
arm_big_little.c	cpufreq: arm_big_little: remove compile-time dependency on BIG_LITTLE	2015-05-15 01:53:42 +02:00
arm_big_little.h	cpufreq: arm_big_little: free OPP table created during ->init()	2014-12-02 00:01:24 +01:00
arm_big_little_dt.c	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
at32ap-cpufreq.c
blackfin-cpufreq.c
cpufreq-dt.c	cpufreq: dt: allow driver to boot automatically	2015-06-17 00:02:34 +02:00
cpufreq-nforce2.c	cpufreq: nforce2: Fix typo in comment to function nforce2_init()	2015-06-15 15:45:24 +02:00
cpufreq.c	cpufreq: Avoid attempts to create duplicate symbolic links	2015-07-28 17:19:26 +02:00
cpufreq_conservative.c	cpufreq: governor: Serialize governor callbacks	2015-06-15 15:42:53 +02:00
cpufreq_governor.c	cpufreq: governor: Serialize governor callbacks	2015-06-15 15:42:53 +02:00
cpufreq_governor.h	cpufreq: governor: Serialize governor callbacks	2015-06-15 15:42:53 +02:00
cpufreq_ondemand.c	cpufreq: governor: Serialize governor callbacks	2015-06-15 15:42:53 +02:00
cpufreq_opp.c	cpufreq / OPP: Fix the order of arguments for kcalloc()	2014-09-08 00:02:58 +02:00
cpufreq_performance.c
cpufreq_powersave.c
cpufreq_stats.c	cpufreq: stats: drop unnecessary locking	2015-01-23 23:06:45 +01:00
cpufreq_userspace.c
cris-artpec3-cpufreq.c
cris-etraxfs-cpufreq.c
davinci-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00
dbx500-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00
e_powersaver.c
elanfreq.c
exynos-cpufreq.c	Fix up implicit <module.h> users that will break later.	2015-07-02 10:25:22 -07:00
exynos-cpufreq.h	cpufreq: exynos: remove Exynos4210 specific cpufreq driver support	2015-06-20 12:17:44 -07:00
exynos4x12-cpufreq.c	cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'	2014-10-03 15:37:54 +02:00
exynos5250-cpufreq.c	cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'	2014-10-03 15:37:54 +02:00
exynos5440-cpufreq.c	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
freq_table.c	cpufreq: Allow freq_table to be obtained for offline CPUs	2015-07-10 01:43:27 +02:00
gx-suspmod.c	cpufreq: gx-suspmod: Fix two typos in two comments	2015-06-15 15:46:15 +02:00
highbank-cpufreq.c	Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2014-10-21 11:21:19 -07:00
hisi-acpu-cpufreq.c	cpufreq: hisilicon: add acpu driver	2015-04-02 02:24:54 +02:00
ia64-acpi-cpufreq.c
imx6q-cpufreq.c	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
integrator-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00
intel_pstate.c	intel_pstate: Add get_scaling cpu_defaults param to Knights Landing	2015-07-27 01:59:43 +02:00
Kconfig	cpufreq: qoriq: rename the driver	2015-03-18 22:35:16 +01:00
Kconfig.arm	The changes to the common clock framework for 4.2 are dominated by new	2015-07-01 19:22:00 -07:00
Kconfig.powerpc	cpufreq: qoriq: rename the driver	2015-03-18 22:35:16 +01:00
Kconfig.x86	cpufreq: Add SFI based cpufreq driver support	2014-12-20 13:37:37 -05:00
kirkwood-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00
longhaul.c	Update/Remove soon-to-be-dead email address	2014-12-19 12:56:15 -08:00
longhaul.h
longrun.c
loongson2_cpufreq.c	MIPS, CPUFREQ: Fix spelling of Institute.	2015-07-07 20:59:42 +02:00
ls1x-cpufreq.c	MIPS: Loongson: Naming style cleanup and rework	2015-06-21 21:53:59 +02:00
Makefile	cpufreq: exynos: remove Exynos4210 specific cpufreq driver support	2015-06-20 12:17:44 -07:00
maple-cpufreq.c
omap-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00
p4-clockmod.c	p4-clockmod: Replace cpu_sibling_mask() with topology_sibling_cpumask()	2015-05-27 15:22:16 +02:00
pasemi-cpufreq.c
pcc-cpufreq.c	cpufreq: pcc: Enable autoload of pcc-cpufreq for ACPI processors	2014-11-14 00:16:25 +01:00
pmac32-cpufreq.c	powerpc: Remove powerpc specific cmd_line	2014-10-02 17:33:55 +10:00
pmac64-cpufreq.c	of: Migrate of_find_node_by_name() users to for_each_node_by_name()	2014-06-26 17:12:24 +01:00
powernow-k6.c	Update/Remove soon-to-be-dead email address	2014-12-19 12:56:15 -08:00
powernow-k7.c	Update/Remove soon-to-be-dead email address	2014-12-19 12:56:15 -08:00
powernow-k7.h
powernow-k8.c	powernow-k8: Replace cpu_core_mask() with topology_core_cpumask()	2015-05-27 15:22:16 +02:00
powernow-k8.h
powernv-cpufreq.c	cpufreq: powernv: Report cpu frequency throttling	2015-04-01 23:02:24 +02:00
ppc_cbe_cpufreq.c
ppc_cbe_cpufreq.h
ppc_cbe_cpufreq_pervasive.c
ppc_cbe_cpufreq_pmi.c
pxa2xx-cpufreq.c	cpufreq: pxa: make pxa_freqs arrays const	2015-05-05 00:49:38 +02:00
pxa3xx-cpufreq.c
qoriq-cpufreq.c	cpufreq: qoriq: optimize the CPU frequency switching time	2015-06-15 15:47:28 +02:00
s3c24xx-cpufreq-debugfs.c
s3c24xx-cpufreq.c	cpufreq: s3c: remove last use of resume_clocks callback	2015-02-19 06:36:53 +01:00
s3c64xx-cpufreq.c
s3c2410-cpufreq.c	cpufreq: s3c24xx: Remove some dead code	2014-07-19 04:24:59 +09:00
s3c2412-cpufreq.c	cpufreq: s3c24xx: Remove some dead code	2014-07-19 04:24:59 +09:00
s3c2416-cpufreq.c	cpufreq: s3c: remove incorrect __init annotations	2015-02-19 06:36:53 +01:00
s3c2440-cpufreq.c	cpufreq: s3c24xx: Remove some dead code	2014-07-19 04:24:59 +09:00
s5pv210-cpufreq.c	drivers/cpufreq: Convert non-modular s5pv210-cpufreq.c to use builtin_platform_driver	2015-06-16 14:12:38 -04:00
sa1100-cpufreq.c
sa1110-cpufreq.c	cpufreq: sa1110: set memory type for h3600	2014-07-16 14:30:17 +02:00
sc520_freq.c
sfi-cpufreq.c	cpufreq: Add SFI based cpufreq driver support	2014-12-20 13:37:37 -05:00
sh-cpufreq.c
sparc-us2e-cpufreq.c
sparc-us3-cpufreq.c
spear-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00
speedstep-centrino.c
speedstep-ich.c	speedstep-ich: Replace cpu_sibling_mask() with topology_sibling_cpumask()	2015-05-27 15:22:16 +02:00
speedstep-lib.c	cpufreq: speedstep-smi: enable interrupts when waiting	2015-02-12 02:02:52 +01:00
speedstep-lib.h
speedstep-smi.c	cpufreq: speedstep-smi: enable interrupts when waiting	2015-02-12 02:02:52 +01:00
tegra-cpufreq.c
unicore2-cpufreq.c
vexpress-spc-cpufreq.c	cpufreq: drop owner assignment from platform_drivers	2014-10-20 16:20:24 +02:00