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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-04-26 00:12:04 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-27 10:57:32 -0700 |
| commit | 523ded71de0c5e66973335bf99a80edfda9f401b (patch) | |
| tree | 20f47e8ed91018977d9fb7f4169a6ef8db407b82 /include | |
| parent | fa1a8c23eb7d3ded8a3c6d0e653339a2bc7fca9e (diff) | |
| download | lwn-523ded71de0c5e66973335bf99a80edfda9f401b.tar.gz lwn-523ded71de0c5e66973335bf99a80edfda9f401b.zip | |
device_schedule_callback() needs a module reference
This patch (as896b) fixes an oversight in the design of
device_schedule_callback(). It is necessary to acquire a reference to the
module owning the callback routine, to prevent the module from being
unloaded before the callback can run.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Satyam Sharma <satyam.sharma@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/device.h | 8 | ||||
| -rw-r--r-- | include/linux/sysfs.h | 4 |
2 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index af603a137690..8511d14071b3 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -367,8 +367,12 @@ 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 *)); +extern int device_schedule_callback_owner(struct device *dev, + void (*func)(struct device *), struct module *owner); + +/* This is a macro to avoid include problems with THIS_MODULE */ +#define device_schedule_callback(dev, func) \ + device_schedule_callback_owner(dev, func, THIS_MODULE) /* 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 fea9a6b3fb7b..7d5d1ec95c2e 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -80,7 +80,7 @@ struct sysfs_ops { #ifdef CONFIG_SYSFS extern int sysfs_schedule_callback(struct kobject *kobj, - void (*func)(void *), void *data); + void (*func)(void *), void *data, struct module *owner); extern int __must_check sysfs_create_dir(struct kobject *, struct dentry *); @@ -137,7 +137,7 @@ extern int __must_check sysfs_init(void); #else /* CONFIG_SYSFS */ static inline int sysfs_schedule_callback(struct kobject *kobj, - void (*func)(void *), void *data) + void (*func)(void *), void *data, struct module *owner) { return -ENOSYS; } |