[PATCH] ARM: oprofile: convert from sysdev to platform device
From: Aaro Koskinen <hidden>
Date: 2010-02-17 14:05:55
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
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. Signed-off-by: Aaro Koskinen <redacted> --- arch/arm/oprofile/common.c | 44 ++++++++++++++++++++++++++++---------------- 1 files changed, 28 insertions(+), 16 deletions(-)
diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c
index 3fcd752..af0ffda 100644
--- a/arch/arm/oprofile/common.c
+++ b/arch/arm/oprofile/common.c@@ -11,7 +11,8 @@ #include <linux/oprofile.h> #include <linux/errno.h> #include <linux/slab.h> -#include <linux/sysdev.h> +#include <linux/err.h> +#include <linux/platform_device.h> #include <linux/mutex.h> #include "op_counter.h"
@@ -77,7 +78,7 @@ 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)
@@ -86,7 +87,7 @@ 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_arm_model->start())
@@ -95,34 +96,41 @@ 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) + return ret; + + oprofile_pdev = + platform_device_register_simple("arm-oprofile", 0, NULL, 0); + if (IS_ERR(oprofile_pdev)) { + ret = PTR_ERR(oprofile_pdev); + platform_driver_unregister(&oprofile_driver); + } 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 */
@@ -159,8 +167,12 @@ int __init oprofile_arch_init(struct oprofile_operations *ops) if (!counter_config) return -ENOMEM; + ret = init_driverfs(); + if (ret) { + kfree(counter_config); + return ret; + } op_arm_model = spec; - init_driverfs(); ops->create_files = op_arm_create_files; ops->setup = op_arm_setup; ops->shutdown = op_arm_stop;
@@ -178,6 +190,6 @@ void oprofile_arch_exit(void) if (op_arm_model) { exit_driverfs(); op_arm_model = NULL; + kfree(counter_config); } - kfree(counter_config); }
--
1.5.6.5