114 	unsigned		nr_events;  member
445 static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events)  in aio_setup_ring()  argument
455 	nr_events += 2;	/* 1 is required, 2 for good luck */  in aio_setup_ring()
458 	size += sizeof(struct io_event) * nr_events;  in aio_setup_ring()
471 	nr_events = (PAGE_SIZE * nr_pages - sizeof(struct aio_ring))  in aio_setup_ring()
526 	ctx->nr_events = nr_events; /* trusted copy */  in aio_setup_ring()
529 	ring->nr = nr_events;	/* user copy */  in aio_setup_ring()
686 static struct kioctx *ioctx_alloc(unsigned nr_events)  in ioctx_alloc()  argument
696 	unsigned int max_reqs = nr_events;  in ioctx_alloc()
707 	nr_events = max(nr_events, num_possible_cpus() * 4);  in ioctx_alloc()
708 	nr_events *= 2;  in ioctx_alloc()
711 	if (nr_events > (0x10000000U / sizeof(struct io_event))) {  in ioctx_alloc()
716 	if (!nr_events || (unsigned long)max_reqs > aio_max_nr)  in ioctx_alloc()
745 	err = aio_setup_ring(ctx, nr_events);  in ioctx_alloc()
749 	atomic_set(&ctx->reqs_available, ctx->nr_events - 1);  in ioctx_alloc()
750 	ctx->req_batch = (ctx->nr_events - 1) / (num_possible_cpus() * 4);  in ioctx_alloc()
776 		 ctx, ctx->user_id, mm, ctx->nr_events);  in ioctx_alloc()
947 	head %= ctx->nr_events;  in refill_reqs_available()
951 		events_in_ring = ctx->nr_events - (head - tail);  in refill_reqs_available()
1081 	if (++tail >= ctx->nr_events)  in aio_complete()
1175 	pr_debug("h%u t%u m%u\n", head, tail, ctx->nr_events);  in aio_read_events_ring()
1180 	head %= ctx->nr_events;  in aio_read_events_ring()
1181 	tail %= ctx->nr_events;  in aio_read_events_ring()
1188 		avail = (head <= tail ?  tail : ctx->nr_events) - head;  in aio_read_events_ring()
1211 		head %= ctx->nr_events;  in aio_read_events_ring()
1285 SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)  in SYSCALL_DEFINE2()  argument
1296 	if (unlikely(ctx || nr_events == 0)) {  in SYSCALL_DEFINE2()
1298 		         ctx, nr_events);  in SYSCALL_DEFINE2()
1302 	ioctx = ioctx_alloc(nr_events);  in SYSCALL_DEFINE2()
1316 COMPAT_SYSCALL_DEFINE2(io_setup, unsigned, nr_events, u32 __user *, ctx32p)  in COMPAT_SYSCALL_DEFINE2()  argument
1327 	if (unlikely(ctx || nr_events == 0)) {  in COMPAT_SYSCALL_DEFINE2()
1329 		         ctx, nr_events);  in COMPAT_SYSCALL_DEFINE2()
1333 	ioctx = ioctx_alloc(nr_events);  in COMPAT_SYSCALL_DEFINE2()
1904 	if (nr > ctx->nr_events)  in SYSCALL_DEFINE3()
1905 		nr = ctx->nr_events;  in SYSCALL_DEFINE3()
1944 	if (nr > ctx->nr_events)  in COMPAT_SYSCALL_DEFINE3()
1945 		nr = ctx->nr_events;  in COMPAT_SYSCALL_DEFINE3()