linux-kernel - [RFC PATCH V3 28/43] rv64ilp32_abi: iov_iter: Resize kvec to match iov

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Message-Id: <20250325121624.523258-29-guoren@kernel.org>
Date: Tue, 25 Mar 2025 08:16:09 -0400
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Subject: [RFC PATCH V3 28/43] rv64ilp32_abi: iov_iter: Resize kvec to match iov_iter's size

From: "Guo Ren (Alibaba DAMO Academy)" <guoren@...nel.org>

As drivers/vhost/vringh.c uses BUILD_BUG_ON(sizeof(struct iovec)
!= sizeof(struct kvec)), make them the same.

Signed-off-by: Guo Ren (Alibaba DAMO Academy) <guoren@...nel.org>
---
 include/linux/uio.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/uio.h b/include/linux/uio.h
index 8ada84e85447..0e1ca023374c 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -17,7 +17,13 @@ typedef unsigned int __bitwise iov_iter_extraction_t;
 
 struct kvec {
 	void *iov_base; /* and that should *never* hold a userland pointer */
+#if defined(CONFIG_64BIT) && (BITS_PER_LONG == 32)
+	u32  __pad1;
+#endif
 	size_t iov_len;
+#if defined(CONFIG_64BIT) && (BITS_PER_LONG == 32)
+	u32  __pad2;
+#endif
 };
 
 enum iter_type {
-- 
2.40.1