linux-kernel - [PATCH v3 RESEND 2/2] tools/virtio: fix build caused by virtio

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Date:   Mon, 17 Apr 2023 11:20:37 +0900
From:   Shunsuke Mie <mie@...l.co.jp>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     Jason Wang <jasowang@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Shunsuke Mie <mie@...l.co.jp>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Eugenio Pérez <eperezma@...hat.com>,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH v3 RESEND 2/2] tools/virtio: fix build caused by virtio_ring changes

Fix the build dependency for virtio_test. The virtio_ring that is used from
the test requires container_of_const(). Change to use container_of.h kernel
header directly and adapt related codes.

Signed-off-by: Shunsuke Mie <mie@...l.co.jp>
---
Changes from v2: https://lore.kernel.org/virtualization/20230410112845.337212-2-mie@igel.co.jp/
- Remove an unnecessary change
- Correct indentations
- Retrieve the __user definition to prevent any unintended side effects

 tools/include/linux/types.h   |  5 +++++
 tools/virtio/linux/compiler.h |  2 ++
 tools/virtio/linux/kernel.h   |  5 +----
 tools/virtio/linux/uaccess.h  | 11 ++---------
 4 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/tools/include/linux/types.h b/tools/include/linux/types.h
index 051fdeaf2670..8519386acd23 100644
--- a/tools/include/linux/types.h
+++ b/tools/include/linux/types.h
@@ -49,7 +49,12 @@ typedef __s8  s8;
 #endif
 
 #define __force
+/* This is defined in linux/compiler_types.h and is left for backward
+ * compatibility.
+ */
+#ifndef __user
 #define __user
+#endif
 #define __must_check
 #define __cold
 
diff --git a/tools/virtio/linux/compiler.h b/tools/virtio/linux/compiler.h
index 2c51bccb97bb..1f3a15b954b9 100644
--- a/tools/virtio/linux/compiler.h
+++ b/tools/virtio/linux/compiler.h
@@ -2,6 +2,8 @@
 #ifndef LINUX_COMPILER_H
 #define LINUX_COMPILER_H
 
+#include "../../../include/linux/compiler_types.h"
+
 #define WRITE_ONCE(var, val) \
 	(*((volatile typeof(val) *)(&(var))) = (val))
 
diff --git a/tools/virtio/linux/kernel.h b/tools/virtio/linux/kernel.h
index 8b877167933d..6702008f7f5c 100644
--- a/tools/virtio/linux/kernel.h
+++ b/tools/virtio/linux/kernel.h
@@ -10,6 +10,7 @@
 #include <stdarg.h>
 
 #include <linux/compiler.h>
+#include "../../../include/linux/container_of.h"
 #include <linux/log2.h>
 #include <linux/types.h>
 #include <linux/overflow.h>
@@ -107,10 +108,6 @@ static inline void free_page(unsigned long addr)
 	free((void *)addr);
 }
 
-#define container_of(ptr, type, member) ({			\
-	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
-	(type *)( (char *)__mptr - offsetof(type,member) );})
-
 # ifndef likely
 #  define likely(x)	(__builtin_expect(!!(x), 1))
 # endif
diff --git a/tools/virtio/linux/uaccess.h b/tools/virtio/linux/uaccess.h
index 991dfb263998..f13828e0c409 100644
--- a/tools/virtio/linux/uaccess.h
+++ b/tools/virtio/linux/uaccess.h
@@ -6,15 +6,10 @@
 
 extern void *__user_addr_min, *__user_addr_max;
 
-static inline void __chk_user_ptr(const volatile void *p, size_t size)
-{
-	assert(p >= __user_addr_min && p + size <= __user_addr_max);
-}
-
 #define put_user(x, ptr)					\
 ({								\
 	typeof(ptr) __pu_ptr = (ptr);				\
-	__chk_user_ptr(__pu_ptr, sizeof(*__pu_ptr));		\
+	__chk_user_ptr(__pu_ptr);				\
 	WRITE_ONCE(*(__pu_ptr), x);				\
 	0;							\
 })
@@ -22,7 +17,7 @@ static inline void __chk_user_ptr(const volatile void *p, size_t size)
 #define get_user(x, ptr)					\
 ({								\
 	typeof(ptr) __pu_ptr = (ptr);				\
-	__chk_user_ptr(__pu_ptr, sizeof(*__pu_ptr));		\
+	__chk_user_ptr(__pu_ptr);				\
 	x = READ_ONCE(*(__pu_ptr));				\
 	0;							\
 })
@@ -37,7 +32,6 @@ static void volatile_memcpy(volatile char *to, const volatile char *from,
 static inline int copy_from_user(void *to, const void __user volatile *from,
 				 unsigned long n)
 {
-	__chk_user_ptr(from, n);
 	volatile_memcpy(to, from, n);
 	return 0;
 }
@@ -45,7 +39,6 @@ static inline int copy_from_user(void *to, const void __user volatile *from,
 static inline int copy_to_user(void __user volatile *to, const void *from,
 			       unsigned long n)
 {
-	__chk_user_ptr(to, n);
 	volatile_memcpy(to, from, n);
 	return 0;
 }
-- 
2.25.1