linux-kernel - [PATCH 01/14] tools/virtio: fix up compiler.h stub

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Message-ID: <56424ce95c72cb4957070a7cd3c3c40ad5addaee.1764873799.git.mst@redhat.com>
Date: Thu, 4 Dec 2025 13:46:01 -0500
From: "Michael S. Tsirkin" <mst@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	virtualization@...ts.linux.dev
Subject: [PATCH 01/14] tools/virtio: fix up compiler.h stub

Add #undef __user before and after including compiler_types.h to avoid
redefinition warnings when compiling with system headers that also
define __user. This allows tools/virtio to build without warnings.

Additionally, stub out __must_check

Created using Cursor CLI.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 tools/virtio/linux/compiler.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/virtio/linux/compiler.h b/tools/virtio/linux/compiler.h
index 204ef0e9f542..7f9e308f3880 100644
--- a/tools/virtio/linux/compiler.h
+++ b/tools/virtio/linux/compiler.h
@@ -2,7 +2,11 @@
 #ifndef LINUX_COMPILER_H
 #define LINUX_COMPILER_H
 
+/* Avoid redefinition warnings */
+#undef __user
 #include "../../../include/linux/compiler_types.h"
+#undef __user
+#define __user
 
 #define WRITE_ONCE(var, val) \
 	(*((volatile typeof(val) *)(&(var))) = (val))
@@ -35,4 +39,6 @@
 	__v;								\
 })
 
+#define __must_check
+
 #endif
-- 
MST