SYSFS_SCHEDULE_CALLB(9) The Filesystem for Exporting K SYSFS_SCHEDULE_CALLB(9)NAMEsysfs_schedule_callback - helper to schedule a callback for a kobject
SYNOPSIS
int sysfs_schedule_callback(struct kobject * kobj,
void (*func) (void *), void * data,
struct module * owner);
ARGUMENTS
kobj
object we´re acting for.
func
callback function to invoke later.
data
argument to pass to func.
owner
module owning the callback code
DESCRIPTION
sysfs attribute methods must not unregister themselves or their parent
kobject (which would amount to the same thing). Attempts to do so will
deadlock, since unregistration is mutually exclusive with driver
callbacks.
Instead methods can call this routine, which will attempt to allocate
and schedule a workqueue request to call back func with data as its
argument in the workqueue´s process context. kobj will be pinned until
func returns.
Returns 0 if the request was submitted, -ENOMEM if storage could not be
allocated, -ENODEV if a reference to owner isn´t available, -EAGAIN if
a callback has already been scheduled for kobj.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 SYSFS_SCHEDULE_CALLB(9)
