From d9a9cdfb078d755e648d53ec25b7370f84ee5729 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 15 Mar 2007 15:50:34 -0400 Subject: [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 This patch (as868) adds a helper routine for device drivers that need to set up a callback to perform some action in a different process's context. This is intended for use by attribute methods that want to unregister themselves or their parent device. Attribute method calls are mutually exclusive with unregistration, so such actions cannot be taken directly. Two attribute methods are converted to use the new helper routine: one for SCSI device deletion and one for System/390 ccwgroup devices. Signed-off-by: Alan Stern Cc: Hugh Dickins Cc: Cornelia Huck Cc: Oliver Neukum Signed-off-by: Linus Torvalds --- include/linux/device.h | 2 ++ include/linux/sysfs.h | 9 +++++++++ 2 files changed, 11 insertions(+) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 39a3199..caad9bb 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -353,6 +353,8 @@ extern int __must_check device_create_bin_file(struct device *dev, struct bin_attribute *attr); extern void device_remove_bin_file(struct device *dev, struct bin_attribute *attr); +extern int device_schedule_callback(struct device *dev, + void (*func)(struct device *)); /* device resource management */ typedef void (*dr_release_t)(struct device *dev, void *res); diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 523405e..0544edd 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -78,6 +78,9 @@ struct sysfs_ops { #ifdef CONFIG_SYSFS +extern int sysfs_schedule_callback(struct kobject *kobj, + void (*func)(void *), void *data); + extern int __must_check sysfs_create_dir(struct kobject *, struct dentry *); @@ -132,6 +135,12 @@ extern int __must_check sysfs_init(void); #else /* CONFIG_SYSFS */ +static inline int sysfs_schedule_callback(struct kobject *kobj, + void (*func)(void *), void *data) +{ + return -ENOSYS; +} + static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow) { return 0; -- cgit v1.1