// SPDX-License-Identifier: GPL-2.0#ifndef IOU_WAIT_H#define IOU_WAIT_H #include <linux/io_uring_types.h> /* * No waiters. It's larger than any valid value of the tw counter * so that tests against ->cq_wait_nr would fail and skip wake_up(). */#define IO_CQ_WAKE_INIT		(-1U)/* Forced wake up if there is a waiter regardless of ->cq_wait_nr */#define IO_CQ_WAKE_FORCE	(IO_CQ_WAKE_INIT >> 1) struct ext_arg {	size_t argsz;	struct timespec64 ts;	const sigset_t __user *sig;	ktime_t min_time;	bool ts_set;	bool iowait;}; int io_cqring_wait(struct io_ring_ctx *ctx, int min_events, u32 flags,		   struct ext_arg *ext_arg);int io_run_task_work_sig(struct io_ring_ctx *ctx);void io_cqring_do_overflow_flush(struct io_ring_ctx *ctx); static inline unsigned int __io_cqring_events(struct io_ring_ctx *ctx){	struct io_rings *rings = io_get_rings(ctx);	return ctx->cached_cq_tail - READ_ONCE(rings->cq.head);} static inline unsigned int __io_cqring_events_user(struct io_ring_ctx *ctx){	struct io_rings *rings = io_get_rings(ctx); 	return READ_ONCE(rings->cq.tail) - READ_ONCE(rings->cq.head);} /* * Reads the tail/head of the CQ ring while providing an acquire ordering, * see comment at top of io_uring.c. */static inline unsigned io_cqring_events(struct io_ring_ctx *ctx){	smp_rmb();	return __io_cqring_events(ctx);} #endif