linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2014-09-08	cpufreq / OPP: Fix the order of arguments for kcalloc()	Anand Moon	1	-1/+1
	These changes fix the argument to the kcalloc @n: number of elements. @size: element size. @flags: the type of memory to allocate (see kmalloc). void *kcalloc(size_t n, size_t size, gfp_t flags) Fixes: 3c5445ce3a0c (cpufreq: OPP: Avoid sleeping while atomic) Signed-off-by: Anand Moon <moon.linux@yahoo.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-07	cpufreq: OPP: Avoid sleeping while atomic	Stephen Boyd	1	-1/+1
	We allocate the cpufreq table after calling rcu_read_lock(), which disables preemption. This causes scheduling while atomic warnings. Use GFP_ATOMIC instead of GFP_KERNEL and update for kcalloc while we're here. BUG: sleeping function called from invalid context at mm/slub.c:1246 in_atomic(): 0, irqs_disabled(): 0, pid: 80, name: modprobe 5 locks held by modprobe/80: #0: (&dev->mutex){......}, at: [<c050d484>] __driver_attach+0x48/0x98 #1: (&dev->mutex){......}, at: [<c050d494>] __driver_attach+0x58/0x98 #2: (subsys mutex#5){+.+.+.}, at: [<c050c114>] subsys_interface_register+0x38/0xc8 #3: (cpufreq_rwsem){.+.+.+}, at: [<c05a9c8c>] __cpufreq_add_dev.isra.22+0x84/0x92c #4: (rcu_read_lock){......}, at: [<c05ab24c>] dev_pm_opp_init_cpufreq_table+0x18/0x10c Preemption disabled at:[< (null)>] (null) CPU: 2 PID: 80 Comm: modprobe Not tainted 3.16.0-rc3-next-20140701-00035-g286857f216aa-dirty #217 [<c0214da8>] (unwind_backtrace) from [<c02123f8>] (show_stack+0x10/0x14) [<c02123f8>] (show_stack) from [<c070141c>] (dump_stack+0x70/0xbc) [<c070141c>] (dump_stack) from [<c02f4cb0>] (__kmalloc+0x124/0x250) [<c02f4cb0>] (__kmalloc) from [<c05ab270>] (dev_pm_opp_init_cpufreq_table+0x3c/0x10c) [<c05ab270>] (dev_pm_opp_init_cpufreq_table) from [<bf000508>] (cpufreq_init+0x48/0x378 [cpufreq_generic]) [<bf000508>] (cpufreq_init [cpufreq_generic]) from [<c05a9e08>] (__cpufreq_add_dev.isra.22+0x200/0x92c) [<c05a9e08>] (__cpufreq_add_dev.isra.22) from [<c050c160>] (subsys_interface_register+0x84/0xc8) [<c050c160>] (subsys_interface_register) from [<c05a9494>] (cpufreq_register_driver+0x108/0x2d8) [<c05a9494>] (cpufreq_register_driver) from [<bf000888>] (generic_cpufreq_probe+0x50/0x74 [cpufreq_generic]) [<bf000888>] (generic_cpufreq_probe [cpufreq_generic]) from [<c050e994>] (platform_drv_probe+0x18/0x48) [<c050e994>] (platform_drv_probe) from [<c050d1f4>] (driver_probe_device+0x128/0x370) [<c050d1f4>] (driver_probe_device) from [<c050d4d0>] (__driver_attach+0x94/0x98) [<c050d4d0>] (__driver_attach) from [<c050b778>] (bus_for_each_dev+0x54/0x88) [<c050b778>] (bus_for_each_dev) from [<c050c894>] (bus_add_driver+0xe8/0x204) [<c050c894>] (bus_add_driver) from [<c050dd48>] (driver_register+0x78/0xf4) [<c050dd48>] (driver_register) from [<c0208870>] (do_one_initcall+0xac/0x1d8) [<c0208870>] (do_one_initcall) from [<c028b6b4>] (load_module+0x190c/0x21e8) [<c028b6b4>] (load_module) from [<c028c034>] (SyS_init_module+0xa4/0x110) [<c028c034>] (SyS_init_module) from [<c020f0c0>] (ret_fast_syscall+0x0/0x48) Fixes: a0dd7b79657b (PM / OPP: Move cpufreq specific OPP functions out of generic OPP library) Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 3.16+ <stable@vger.kernel.org> # 3.16+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-07	PM / OPP: Move cpufreq specific OPP functions out of generic OPP library	Nishanth Menon	1	-0/+110
	CPUFreq specific helper functions for OPP (Operating Performance Points) now use generic OPP functions that allow CPUFreq to be be moved back into CPUFreq framework. This allows for independent modifications or future enhancements as needed isolated to just CPUFreq framework alone. Here, we just move relevant code and documentation to make this part of CPUFreq infrastructure. Cc: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>