diff --git a/fs/io_uring.c b/fs/io_uring.c index 86d5cd0fc7a7f97225268715673d35acae24263b..302bc7ea915edde987a1396fbedf682b91d71a81 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3391,6 +3391,8 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p) p->cq_off.ring_entries = offsetof(struct io_rings, cq_ring_entries); p->cq_off.overflow = offsetof(struct io_rings, cq_overflow); p->cq_off.cqes = offsetof(struct io_rings, cqes); + + p->features = IORING_FEAT_SINGLE_MMAP; return ret; err: io_ring_ctx_wait_and_kill(ctx); diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 1e1652f25cc19d8c7b6f1090fc5633011ba6f624..96ee9d94b73e22428bccdb66452d10fdabb9aee5 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -128,11 +128,17 @@ struct io_uring_params { __u32 flags; __u32 sq_thread_cpu; __u32 sq_thread_idle; - __u32 resv[5]; + __u32 features; + __u32 resv[4]; struct io_sqring_offsets sq_off; struct io_cqring_offsets cq_off; }; +/* + * io_uring_params->features flags + */ +#define IORING_FEAT_SINGLE_MMAP (1U << 0) + /* * io_uring_register(2) opcodes and arguments */