// SPDX-License-Identifier: GPL-2.0#ifndef IOU_WAIT_H#define IOU_WAIT_H #include <linux/io_uring_types.h> /* * ->cq_wait_nr is armed with the number of lazy task_work adds the waiter * still needs, and counted down by the add side, with the add reaching zero * issuing the (single) wake up for this wait cycle. Zero and below means no * wake up is to be issued: IO_CQ_WAKE_INIT when no task is waiting (also * what a forced wake up resets it to when claiming one), zero once the * countdown has fired. */#define 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);void io_cqring_overflow_flush_locked(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