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Message-Id: <20200804042354.3930694-3-shorne@gmail.com>
Date: Tue, 4 Aug 2020 13:23:50 +0900
From: Stafford Horne <shorne@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Stafford Horne <shorne@...il.com>, Jonas Bonn <jonas@...thpole.se>,
Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
openrisc@...ts.librecores.org
Subject: [PATCH 2/6] openrisc: uaccess: Fix sparse address space warnings
The OpenRISC user access functions put_user(), get_user() and
clear_user() were missing proper sparse annotations. This generated
warnings like the below.
This patch adds the annotations to fix the warnings.
Example warnings:
net/ipv4/ip_sockglue.c:759:29: warning: incorrect type in argument 1 (different address spaces)
net/ipv4/ip_sockglue.c:759:29: expected void const volatile [noderef] __user *
net/ipv4/ip_sockglue.c:759:29: got int const *__gu_addr
net/ipv4/ip_sockglue.c:764:29: warning: incorrect type in initializer (different address spaces)
net/ipv4/ip_sockglue.c:764:29: expected unsigned char const *__gu_addr
net/ipv4/ip_sockglue.c:764:29: got unsigned char [noderef] __user *
Signed-off-by: Stafford Horne <shorne@...il.com>
---
arch/openrisc/include/asm/uaccess.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/openrisc/include/asm/uaccess.h b/arch/openrisc/include/asm/uaccess.h
index 46e31bb4a9ad..f2fc5c4b88c3 100644
--- a/arch/openrisc/include/asm/uaccess.h
+++ b/arch/openrisc/include/asm/uaccess.h
@@ -100,7 +100,7 @@ extern long __put_user_bad(void);
#define __put_user_check(x, ptr, size) \
({ \
long __pu_err = -EFAULT; \
- __typeof__(*(ptr)) *__pu_addr = (ptr); \
+ __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
if (access_ok(__pu_addr, size)) \
__put_user_size((x), __pu_addr, (size), __pu_err); \
__pu_err; \
@@ -173,7 +173,7 @@ struct __large_struct {
#define __get_user_check(x, ptr, size) \
({ \
long __gu_err = -EFAULT, __gu_val = 0; \
- const __typeof__(*(ptr)) * __gu_addr = (ptr); \
+ const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
if (access_ok(__gu_addr, size)) \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__force __typeof__(*(ptr)))__gu_val; \
@@ -248,10 +248,10 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long size)
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
-extern unsigned long __clear_user(void *addr, unsigned long size);
+extern unsigned long __clear_user(void __user *addr, unsigned long size);
static inline __must_check unsigned long
-clear_user(void *addr, unsigned long size)
+clear_user(void __user *addr, unsigned long size)
{
if (likely(access_ok(addr, size)))
size = __clear_user(addr, size);
--
2.26.2
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