table of contents
| CLASS_FOR_EACH_DEVIC(9) | Device drivers infrastructure | CLASS_FOR_EACH_DEVIC(9) |
NAME¶
class_for_each_device - device iterator
SYNOPSIS¶
int class_for_each_device(struct class * class, struct device * start, void * data, int (*fn) (struct device *, void *));
ARGUMENTS¶
class
the class we´re iterating
start
the device to start with in the list, if any.
data
data for the callback
fn
function to be called for each device
DESCRIPTION¶
Iterate over class´s list of devices, and call fn for each, passing it data. If start is set, the list iteration will start there, otherwise if it is NULL, the iteration starts at the beginning of the list.
We check the return of fn each time. If it returns anything other than 0, we break out and return that value.
fn is allowed to do anything including calling back into class code. There´s no locking restriction.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |