Name

atomic_notifier_call_chain — Call functions in an atomic notifier chain

Synopsis

int atomic_notifier_call_chain (struct atomic_notifier_head *  nh,
 unsigned long  val,
 void *  v);

Arguments

nh

Pointer to head of the atomic notifier chain

val

Value passed unmodified to notifier function

v

Pointer passed unmodified to notifier function

Description

Calls each function in a notifier chain in turn. The functions run in an atomic context, so they must not block. This routine uses RCU to synchronize with changes to the chain.

If the return value of the notifier can be and'ed with NOTIFY_STOP_MASK then atomic_notifier_call_chain will return immediately, with the return value of the notifier function which halted execution. Otherwise the return value is the return value of the last notifier function called.