[PATCH V9 2/7] io_uring: rename ubuf of io_mapped_buf as start

[Ming Lei <ming.lei@redhat.com>]

->ubuf of `io_mapped_buf` stores the start address of userspace fixed
buffer. `io_mapped_buf` will be extended for covering kernel buffer,
so rename ->ubuf as ->start.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 io_uring/fdinfo.c | 2 +-
 io_uring/rsrc.c   | 6 +++---
 io_uring/rsrc.h   | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/io_uring/fdinfo.c b/io_uring/fdinfo.c
index 9ca95f877312..9b39cb596136 100644
--- a/io_uring/fdinfo.c
+++ b/io_uring/fdinfo.c
@@ -223,7 +223,7 @@ __cold void io_uring_show_fdinfo(struct seq_file *m, struct file *file)
 		if (ctx->buf_table.nodes[i])
 			buf = ctx->buf_table.nodes[i]->buf;
 		if (buf)
-			seq_printf(m, "%5u: 0x%llx/%u\n", i, buf->ubuf, buf->len);
+			seq_printf(m, "%5u: 0x%llx/%u\n", i, buf->start, buf->len);
 		else
 			seq_printf(m, "%5u: <none>\n", i);
 	}
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 70dba4a4de1d..9b8827c72230 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -765,7 +765,7 @@ static struct io_rsrc_node *io_sqe_buffer_register(struct io_ring_ctx *ctx,
 
 	size = iov->iov_len;
 	/* store original address for later verification */
-	imu->ubuf = (unsigned long) iov->iov_base;
+	imu->start = (unsigned long) iov->iov_base;
 	imu->len = iov->iov_len;
 	imu->nr_bvecs = nr_pages;
 	imu->folio_shift = PAGE_SHIFT;
@@ -877,14 +877,14 @@ int io_import_fixed(int ddir, struct iov_iter *iter,
 	if (unlikely(check_add_overflow(buf_addr, (u64)len, &buf_end)))
 		return -EFAULT;
 	/* not inside the mapped region */
-	if (unlikely(buf_addr < imu->ubuf || buf_end > (imu->ubuf + imu->len)))
+	if (unlikely(buf_addr < imu->start || buf_end > (imu->start + imu->len)))
 		return -EFAULT;
 
 	/*
 	 * Might not be a start of buffer, set size appropriately
 	 * and advance us to the beginning.
 	 */
-	offset = buf_addr - imu->ubuf;
+	offset = buf_addr - imu->start;
 	iov_iter_bvec(iter, ddir, imu->bvec, imu->nr_bvecs, offset + len);
 
 	if (offset) {
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h
index 9d55f9769c77..887699400e29 100644
--- a/io_uring/rsrc.h
+++ b/io_uring/rsrc.h
@@ -27,7 +27,7 @@ struct io_rsrc_node {
 };
 
 struct io_mapped_buf {
-	u64		ubuf;
+	u64		start;
 	unsigned int	len;
 	unsigned int	nr_bvecs;
 	unsigned int    folio_shift;
-- 
2.47.0