Juri Lelli ede03b5d80 sched/walt: kill {min,max}_capacity ... {min,max}_capacity are static variables that are only updated from __update_min_max_capacity(), but not used anywhere else. Remove them together with the function updating them. This has also the nice side effect of fixing a LOCKDEP warning related to locking all CPUs in update_min_max_capacity(), as reported by Ke Wang: [ 2.853595] c0 ============================================= [ 2.859219] c0 [ INFO: possible recursive locking detected ] [ 2.864852] c0 4.4.6+ #5 Tainted: G W [ 2.869604] c0 --------------------------------------------- [ 2.875230] c0 swapper/0/1 is trying to acquire lock: [ 2.880248] (&rq->lock){-.-.-.}, at: [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c [ 2.888815] c0 [ 2.888815] c0 but task is already holding lock: [ 2.895132] (&rq->lock){-.-.-.}, at: [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c [ 2.903700] c0 [ 2.903700] c0 other info that might help us debug this: [ 2.910710] c0 Possible unsafe locking scenario: [ 2.910710] c0 [ 2.917112] c0 CPU0 [ 2.919795] c0 ---- [ 2.922478] lock(&rq->lock); [ 2.925507] lock(&rq->lock); [ 2.928536] c0 [ 2.928536] c0 *** DEADLOCK *** [ 2.928536] c0 [ 2.935200] c0 May be due to missing lock nesting notation [ 2.935200] c0 [ 2.942471] c0 7 locks held by swapper/0/1: [ 2.946623] #0: (&dev->mutex){......}, at: [<ffffff800850e118>] __driver_attach+0x64/0xb8 [ 2.954931] #1: (&dev->mutex){......}, at: [<ffffff800850e128>] __driver_attach+0x74/0xb8 [ 2.963239] #2: (cpu_hotplug.lock){++++++}, at: [<ffffff80080cb218>] get_online_cpus+0x48/0xa8 [ 2.971979] #3: (subsys mutex#6){+.+.+.}, at: [<ffffff800850bed4>] subsys_interface_register+0x44/0xc0 [ 2.981411] #4: (&policy->rwsem){+.+.+.}, at: [<ffffff8008720338>] cpufreq_online+0x330/0x76c [ 2.990065] #5: ((cpufreq_policy_notifier_list).rwsem){.+.+..}, at: [<ffffff80080f3418>] blocking_notifier_call_chain+0x38/0xc4 [ 3.001661] #6: (&rq->lock){-.-.-.}, at: [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c [ 3.010661] c0 [ 3.010661] c0 stack backtrace: [ 3.015514] c0 CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.4.6+ #5 [ 3.022864] c0 Hardware name: Spreadtrum SP9860g Board (DT) [ 3.028402] c0 Call trace: [ 3.031092] c0 [<ffffff800808b50c>] dump_backtrace+0x0/0x210 [ 3.036716] c0 [<ffffff800808b73c>] show_stack+0x20/0x28 [ 3.041994] c0 [<ffffff8008433310>] dump_stack+0xa8/0xe0 [ 3.047273] c0 [<ffffff80081349e0>] __lock_acquire+0x1e0c/0x2218 [ 3.053243] c0 [<ffffff80081353c0>] lock_acquire+0xe0/0x280 [ 3.058784] c0 [<ffffff8008abfdfc>] _raw_spin_lock+0x44/0x58 [ 3.064407] c0 [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c [ 3.070983] c0 [<ffffff80080f3458>] blocking_notifier_call_chain+0x78/0xc4 [ 3.077820] c0 [<ffffff8008720294>] cpufreq_online+0x28c/0x76c [ 3.083618] c0 [<ffffff80087208a4>] cpufreq_add_dev+0x98/0xdc [ 3.089331] c0 [<ffffff800850bf14>] subsys_interface_register+0x84/0xc0 [ 3.095907] c0 [<ffffff800871fa0c>] cpufreq_register_driver+0x168/0x28c [ 3.102486] c0 [<ffffff80087272f8>] sprd_cpufreq_probe+0x134/0x19c [ 3.108629] c0 [<ffffff8008510768>] platform_drv_probe+0x58/0xd0 [ 3.114599] c0 [<ffffff800850de2c>] driver_probe_device+0x1e8/0x470 [ 3.120830] c0 [<ffffff800850e168>] __driver_attach+0xb4/0xb8 [ 3.126541] c0 [<ffffff800850b750>] bus_for_each_dev+0x6c/0xac [ 3.132339] c0 [<ffffff800850d6c0>] driver_attach+0x2c/0x34 [ 3.137877] c0 [<ffffff800850d234>] bus_add_driver+0x210/0x298 [ 3.143676] c0 [<ffffff800850f1f4>] driver_register+0x7c/0x114 [ 3.149476] c0 [<ffffff8008510654>] __platform_driver_register+0x60/0x6c [ 3.156139] c0 [<ffffff8008f49f40>] sprd_cpufreq_platdrv_init+0x18/0x20 [ 3.162714] c0 [<ffffff8008082a64>] do_one_initcall+0xd0/0x1d8 [ 3.168514] c0 [<ffffff8008f0bc58>] kernel_init_freeable+0x1fc/0x29c [ 3.174834] c0 [<ffffff8008ab554c>] kernel_init+0x20/0x12c [ 3.180281] c0 [<ffffff8008086290>] ret_from_fork+0x10/0x40 Reported-by: Ke Wang <ke.wang@spreadtrum.com> Signed-off-by: Juri Lelli <juri.lelli@arm.com>		2017-01-02 13:54:08 +05:30
..
auto_group.c	sched, timer: Convert usages of ACCESS_ONCE() in the scheduler to READ_ONCE()/WRITE_ONCE()	2015-05-08 12:11:32 +02:00
auto_group.h	sched, timer: Convert usages of ACCESS_ONCE() in the scheduler to READ_ONCE()/WRITE_ONCE()	2015-05-08 12:11:32 +02:00
clock.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
completion.c
core.c	CHROMIUM: remove Android's cgroup generic permissions checks	2016-10-25 21:50:52 +08:00
cpuacct.c
cpuacct.h
cpudeadline.c	sched/deadline: Unify dl_time_before() usage	2015-09-23 09:51:25 +02:00
cpudeadline.h	sched/deadline: Unify dl_time_before() usage	2015-09-23 09:51:25 +02:00
cpufreq_sched.c	cpufreq: sched: Fix kernel crash on accessing sysfs file	2016-12-01 15:18:44 +05:30
cpupri.c
cpupri.h
cputime.c	Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android	2016-09-20 15:18:54 +08:00
deadline.c	sched: deadline: use deadline bandwidth in scale_rt_capacity	2016-09-14 14:58:22 +05:30
debug.c	sched/fair: Provide runnable_load_avg back to cfs_rq	2015-08-03 12:24:31 +02:00
energy.c	sched: Support for extracting EAS energy costs from DT	2016-09-14 14:48:50 +05:30
fair.c	sched/fair: remove printk while schedule is in progress	2016-10-12 17:34:22 +05:30
features.h	sched: Add Kconfig option DEFAULT_USE_ENERGY_AWARE to set ENERGY_AWARE feature flag	2016-10-12 17:34:22 +05:30
idle.c	vmstat: make vmstat_updater deferrable again and shut down on idle	2016-09-14 15:02:22 +05:30
idle_task.c	sched: Make sched_class::set_cpus_allowed() unconditional	2015-08-12 12:06:09 +02:00
loadavg.c	sched/loadavg: Fix loadavg artifacts on fully idle and on fully loaded systems	2016-06-01 12:15:49 -07:00
Makefile	sched: Introduce Window Assisted Load Tracking (WALT)	2016-09-14 15:02:22 +05:30
rt.c	sched/rt: Add Kconfig option to enable panicking for RT throttling	2016-09-14 15:02:22 +05:30
sched.h	sched/walt: use do_div instead of division operator	2016-09-14 15:17:01 +05:30
stats.c
stats.h	sched/stat: Simplify the sched_info accounting dependency	2015-07-04 10:04:30 +02:00
stop_task.c	sched: Introduce Window Assisted Load Tracking (WALT)	2016-09-14 15:02:22 +05:30
tune.c	sched: tune: Fix lacking spinlock initialization	2016-12-01 15:18:44 +05:30
tune.h	sched/tune: Introducing a new schedtune attribute prefer_idle	2016-09-14 15:02:22 +05:30
wait.c	sched/wait: Fix the signal handling fix	2015-12-13 14:30:59 -08:00
walt.c	sched/walt: kill {min,max}_capacity	2017-01-02 13:54:08 +05:30
walt.h	sched/walt: Accounting for number of irqs pending on each core	2016-09-14 15:02:22 +05:30