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nds32: Fix get_user/put_user macro expand pointer problem 

The pointer argument of macro need to be taken out once first, and then
use the new pointer in the macro body.

In kernel/trace/trace.c, get_user(ch, ubuf++) causes the unexpected
increment after expand the macro.

Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This commit is contained in:
Zong Li 2018-08-13 14:48:49 +08:00 committed by Greentime Hu
parent c17df79605
commit 6cce95a6c7
1 changed files with 14 additions and 12 deletions
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26
arch/nds32/include/asm/uaccess.h
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@ -78,8 +78,9 @@ static inline void set_fs(mm_segment_t fs)
#define get_user(x,p) \
({ \
long __e = -EFAULT; \
if(likely(access_ok(VERIFY_READ, p, sizeof(*p)))) { \
__e = __get_user(x,p); \
const __typeof__(*(p)) __user *__p = (p); \
if(likely(access_ok(VERIFY_READ, __p, sizeof(*__p)))) { \
__e = __get_user(x, __p); \
} else \
x = 0; \
__e; \
@ -99,10 +100,10 @@ static inline void set_fs(mm_segment_t fs)
#define __get_user_err(x,ptr,err) \
do { \
unsigned long __gu_addr = (unsigned long)(ptr); \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
unsigned long __gu_val; \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
__chk_user_ptr(__gu_addr); \
switch (sizeof(*(__gu_addr))) { \
case 1: \
__get_user_asm("lbi",__gu_val,__gu_addr,err); \
break; \
@ -119,7 +120,7 @@ do { \
BUILD_BUG(); \
break; \
} \
(x) = (__typeof__(*(ptr)))__gu_val; \
(x) = (__typeof__(*(__gu_addr)))__gu_val; \
} while (0)
#define __get_user_asm(inst,x,addr,err) \
@ -169,8 +170,9 @@ do { \
#define put_user(x,p) \
({ \
long __e = -EFAULT; \
if(likely(access_ok(VERIFY_WRITE, p, sizeof(*p)))) { \
__e = __put_user(x,p); \
__typeof__(*(p)) __user *__p = (p); \
if(likely(access_ok(VERIFY_WRITE, __p, sizeof(*__p)))) { \
__e = __put_user(x, __p); \
} \
__e; \
})
@ -189,10 +191,10 @@ do { \
#define __put_user_err(x,ptr,err) \
do { \
unsigned long __pu_addr = (unsigned long)(ptr); \
__typeof__(*(ptr)) __pu_val = (x); \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
__typeof__(*(__pu_addr)) __pu_val = (x); \
__chk_user_ptr(__pu_addr); \
switch (sizeof(*(__pu_addr))) { \
case 1: \
__put_user_asm("sbi",__pu_val,__pu_addr,err); \
break; \