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x86: user put_user_x instead of all variants.

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Follow the pattern, and define a single put_user_x, instead
of defining macros for all available sizes. Exception is
put_user_8, since the "A" constraint does not give us enough
power to specify which register (a or d) to use in the 32-bit
common case.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa 2008-06-24 15:02:31 -03:00 committed by Ingo Molnar
parent 268cf048c8
commit 70706e432e
1 changed files with 7 additions and 18 deletions
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25
include/asm-x86/uaccess_32.h
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@ -186,25 +186,14 @@ extern void __put_user_2(void);
extern void __put_user_4(void);
extern void __put_user_8(void);
#define __put_user_1(x, ptr) \
asm volatile("call __put_user_1" : "=a" (__ret_pu) \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
#define __put_user_2(x, ptr) \
asm volatile("call __put_user_2" : "=a" (__ret_pu) \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
#define __put_user_4(x, ptr) \
asm volatile("call __put_user_4" : "=a" (__ret_pu) \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
#define __put_user_x(size, x, ptr) \
asm volatile("call __put_user_" #size : "=a" (__ret_pu) \
:"0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
#define __put_user_8(x, ptr) \
asm volatile("call __put_user_8" : "=a" (__ret_pu) \
: "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
#define __put_user_X(x, ptr) \
asm volatile("call __put_user_X" : "=a" (__ret_pu) \
: "c" (ptr): "ebx")
/**
* put_user: - Write a simple value into user space.
@ -232,19 +221,19 @@ extern void __put_user_8(void);
__pu_val = x; \
switch (sizeof(*(ptr))) { \
case 1: \
__put_user_1(__pu_val, ptr); \
__put_user_x(1, __pu_val, ptr); \
break; \
case 2: \
__put_user_2(__pu_val, ptr); \
__put_user_x(2, __pu_val, ptr); \
break; \
case 4: \
__put_user_4(__pu_val, ptr); \
__put_user_x(4, __pu_val, ptr); \
break; \
case 8: \
__put_user_8(__pu_val, ptr); \
break; \
default: \
__put_user_X(__pu_val, ptr); \
__put_user_x(X, __pu_val, ptr); \
break; \
} \
__ret_pu; \