[PATCH 1/1] io_uring: compile out compat param passing

[Pavel Begunkov <asml.silence@xxxxxxxxx>]

Even when COMPAT is compiled out, we still have to pass
ctx->compat to __import_iovec(). Replace the read with an indirection
with a constant when the kernel doesn't support compat.

Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
 io_uring/io_uring.h | 5 +++++
 io_uring/rw.c       | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index 650f81dac5d0..da71067a10bc 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -147,6 +147,11 @@ static inline void io_lockdep_assert_cq_locked(struct io_ring_ctx *ctx)
 #endif
 }
 
+static inline bool io_is_compat(struct io_ring_ctx *ctx)
+{
+	return IS_ENABLED(CONFIG_COMPAT) && ctx->compat;
+}
+
 static inline void io_req_task_work_add(struct io_kiocb *req)
 {
 	__io_req_task_work_add(req, 0);
diff --git a/io_uring/rw.c b/io_uring/rw.c
index 16f12f94943f..c3849a370a2e 100644
--- a/io_uring/rw.c
+++ b/io_uring/rw.c
@@ -75,7 +75,7 @@ static int io_iov_buffer_select_prep(struct io_kiocb *req)
 		return -EINVAL;
 
 #ifdef CONFIG_COMPAT
-	if (req->ctx->compat)
+	if (io_is_compat(req->ctx))
 		return io_iov_compat_buffer_select_prep(rw);
 #endif
 
@@ -120,7 +120,7 @@ static int __io_import_iovec(int ddir, struct io_kiocb *req,
 		nr_segs = 1;
 	}
 	ret = __import_iovec(ddir, buf, sqe_len, nr_segs, &iov, &io->iter,
-				req->ctx->compat);
+				io_is_compat(req->ctx));
 	if (unlikely(ret < 0))
 		return ret;
 	if (iov) {
-- 
2.48.1