eventfd_ctx_fileget
eventfd = eventfd_ctx_fileget(fd_file(f));
ctx = eventfd_ctx_fileget(fd_file(irqfd));
eventfd = eventfd_ctx_fileget(fd_file(f));
kirqfd->eventfd = eventfd_ctx_fileget(fd_file(f));
return eventfd_ctx_fileget(fd_file(f));
EXPORT_SYMBOL_GPL(eventfd_ctx_fileget);
struct eventfd_ctx *eventfd_ctx_fileget(struct file *file);
event->eventfd = eventfd_ctx_fileget(fd_file(efile));
eventfd = eventfd_ctx_fileget(fd_file(f));