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powerpc: clean up uaccess.h

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Use the best from each architecture.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
This commit is contained in:
Stephen Rothwell 2005-11-01 15:53:19 +11:00
parent 3c4cf5ee5a
commit 48fe487156
1 changed files with 8 additions and 21 deletions
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29
include/asm-powerpc/uaccess.h
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@ -115,10 +115,8 @@ struct exception_table_entry {
#define __put_user64(x, ptr) __put_user(x, ptr)
#endif
#ifdef __powerpc64__
#define __get_user_unaligned __get_user
#define __put_user_unaligned __put_user
#endif
extern long __put_user_bad(void);
@ -333,9 +331,6 @@ extern inline unsigned long copy_to_user(void __user *to,
return n;
}
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
#else /* __powerpc64__ */
#define __copy_in_user(to, from, size) \
@ -348,6 +343,8 @@ extern unsigned long copy_to_user(void __user *to, const void *from,
extern unsigned long copy_in_user(void __user *to, const void __user *from,
unsigned long n);
#endif /* __powerpc64__ */
static inline unsigned long __copy_from_user_inatomic(void *to,
const void __user *from, unsigned long n)
{
@ -368,9 +365,10 @@ static inline unsigned long __copy_from_user_inatomic(void *to,
__get_user_size(*(u64 *)to, from, 8, ret);
break;
}
return (ret == -EFAULT) ? n : 0;
if (ret == 0)
return 0;
}
return __copy_tofrom_user((__force void __user *) to, from, n);
return __copy_tofrom_user((__force void __user *)to, from, n);
}
static inline unsigned long __copy_to_user_inatomic(void __user *to,
@ -393,33 +391,24 @@ static inline unsigned long __copy_to_user_inatomic(void __user *to,
__put_user_size(*(u64 *)from, (u64 __user *)to, 8, ret);
break;
}
return (ret == -EFAULT) ? n : 0;
if (ret == 0)
return 0;
}
return __copy_tofrom_user(to, (__force const void __user *) from, n);
return __copy_tofrom_user(to, (__force const void __user *)from, n);
}
#endif /* __powerpc64__ */
static inline unsigned long __copy_from_user(void *to,
const void __user *from, unsigned long size)
{
might_sleep();
#ifndef __powerpc64__
return __copy_tofrom_user((__force void __user *)to, from, size);
#else /* __powerpc64__ */
return __copy_from_user_inatomic(to, from, size);
#endif /* __powerpc64__ */
}
static inline unsigned long __copy_to_user(void __user *to,
const void *from, unsigned long size)
{
might_sleep();
#ifndef __powerpc64__
return __copy_tofrom_user(to, (__force void __user *)from, size);
#else /* __powerpc64__ */
return __copy_to_user_inatomic(to, from, size);
#endif /* __powerpc64__ */
}
extern unsigned long __clear_user(void __user *addr, unsigned long size);
@ -429,12 +418,10 @@ static inline unsigned long clear_user(void __user *addr, unsigned long size)
might_sleep();
if (likely(access_ok(VERIFY_WRITE, addr, size)))
return __clear_user(addr, size);
#ifndef __powerpc64__
if ((unsigned long)addr < TASK_SIZE) {
unsigned long over = (unsigned long)addr + size - TASK_SIZE;
return __clear_user(addr, size - over) + over;
}
#endif /* __powerpc64__ */
return size;
}