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x86: don't always use EFAULT on __get_user_size.

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Let the user of the macro specify the desired return.

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 2008-06-25 11:57:33 -03:00 committed by Ingo Molnar
parent dc70ddf409
commit 6fd4725d75
1 changed files with 6 additions and 6 deletions
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12
include/asm-x86/uaccess_64.h
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@ -61,27 +61,27 @@ extern void __put_user_bad(void);
({ \
int __gu_err; \
unsigned long __gu_val; \
__get_user_size(__gu_val, (ptr), (size), __gu_err); \
__get_user_size(__gu_val, (ptr), (size), __gu_err, -EFAULT);\
(x) = (__force typeof(*(ptr)))__gu_val; \
__gu_err; \
})
#define __get_user_size(x, ptr, size, retval) \
#define __get_user_size(x, ptr, size, retval, errret) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__get_user_asm(x, ptr, retval, "b", "b", "=q", -EFAULT);\
__get_user_asm(x, ptr, retval, "b", "b", "=q", errret);\
break; \
case 2: \
__get_user_asm(x, ptr, retval, "w", "w", "=r", -EFAULT);\
__get_user_asm(x, ptr, retval, "w", "w", "=r", errret);\
break; \
case 4: \
__get_user_asm(x, ptr, retval, "l", "k", "=r", -EFAULT);\
__get_user_asm(x, ptr, retval, "l", "k", "=r", errret);\
break; \
case 8: \
__get_user_asm(x, ptr, retval, "q", "", "=r", -EFAULT); \
__get_user_asm(x, ptr, retval, "q", "", "=r", errret); \
break; \
default: \
(x) = __get_user_bad(); \