Mastering Linux Kernel Development

Initialization

The following macro can be used for static declaration and initialization of a completion structure:

#define DECLARE_COMPLETION(work) \
       struct completion work = COMPLETION_INITIALIZER(work)

The following inline function will initialize a dynamically created completion structure:

static inline void init_completion(struct completion *x)
{
        x->done = 0;
        init_waitqueue_head(&x->wait);
}

The following inline function will be used to reinitialize a completion structure if you need to reuse it. This can be used after complete_all():

static inline void reinit_completion(struct completion *x)
{
        x->done = 0;
}