From d1e86d64bc48dedd0d68d182d0ce6951d8b4fd0d Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 30 Apr 2010 11:38:39 +0100 Subject: [PATCH] ARM: 6074/1: oprofile: convert from sysdev to platform device This is a reworking of an original patch posted by Aaro Koskinen: oprofile does not work with PM, because sysdev_suspend() is done with interrupts disabled and oprofile needs a mutex. Implementing oprofile as a platform device solves this problem. Cc: Aaro Koskinen Signed-off-by: Will Deacon Signed-off-by: Aaro Koskinen Signed-off-by: Russell King --- arch/arm/oprofile/common.c | 44 +++++++++++++++++++++++++------------- 1 file changed, 29 insertions(+), 15 deletions(-) diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c index aad83df89bac..0691176899ff 100644 --- a/arch/arm/oprofile/common.c +++ b/arch/arm/oprofile/common.c @@ -10,13 +10,14 @@ */ #include +#include #include #include #include #include #include +#include #include -#include #include #include @@ -227,7 +228,7 @@ static void op_arm_stop(void) } #ifdef CONFIG_PM -static int op_arm_suspend(struct sys_device *dev, pm_message_t state) +static int op_arm_suspend(struct platform_device *dev, pm_message_t state) { mutex_lock(&op_arm_mutex); if (op_arm_enabled) @@ -236,7 +237,7 @@ static int op_arm_suspend(struct sys_device *dev, pm_message_t state) return 0; } -static int op_arm_resume(struct sys_device *dev) +static int op_arm_resume(struct platform_device *dev) { mutex_lock(&op_arm_mutex); if (op_arm_enabled && op_perf_start()) @@ -245,34 +246,42 @@ static int op_arm_resume(struct sys_device *dev) return 0; } -static struct sysdev_class oprofile_sysclass = { - .name = "oprofile", +static struct platform_driver oprofile_driver = { + .driver = { + .name = "arm-oprofile", + }, .resume = op_arm_resume, .suspend = op_arm_suspend, }; -static struct sys_device device_oprofile = { - .id = 0, - .cls = &oprofile_sysclass, -}; +static struct platform_device *oprofile_pdev; static int __init init_driverfs(void) { int ret; - if (!(ret = sysdev_class_register(&oprofile_sysclass))) - ret = sysdev_register(&device_oprofile); + ret = platform_driver_register(&oprofile_driver); + if (ret) + goto out; + + oprofile_pdev = platform_device_register_simple( + oprofile_driver.driver.name, 0, NULL, 0); + if (IS_ERR(oprofile_pdev)) { + ret = PTR_ERR(oprofile_pdev); + platform_driver_unregister(&oprofile_driver); + } +out: return ret; } static void exit_driverfs(void) { - sysdev_unregister(&device_oprofile); - sysdev_class_unregister(&oprofile_sysclass); + platform_device_unregister(oprofile_pdev); + platform_driver_unregister(&oprofile_driver); } #else -#define init_driverfs() do { } while (0) +static int __init init_driverfs(void) { return 0; } #define exit_driverfs() do { } while (0) #endif /* CONFIG_PM */ @@ -353,6 +362,12 @@ int __init oprofile_arch_init(struct oprofile_operations *ops) return -ENOMEM; } + ret = init_driverfs(); + if (ret) { + kfree(counter_config); + return ret; + } + for_each_possible_cpu(cpu) { perf_events[cpu] = kcalloc(perf_num_counters, sizeof(struct perf_event *), GFP_KERNEL); @@ -365,7 +380,6 @@ int __init oprofile_arch_init(struct oprofile_operations *ops) } } - init_driverfs(); ops->backtrace = arm_backtrace; ops->create_files = op_arm_create_files; ops->setup = op_arm_setup; -- 2.20.1