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OpenCloudOS-Kernel
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m68k: switch to RAW_COPY_USER 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-03-21 08:50:56 -04:00
parent 7cefa5a05d
commit 29be02eb6f
3 changed files with 28 additions and 24 deletions
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1
arch/m68k/Kconfig
View File

@ -22,6 +22,7 @@ config M68K
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
select OLD_SIGACTION
select ARCH_HAS_RAW_COPY_USER
config RWSEM_GENERIC_SPINLOCK
bool

31
arch/m68k/include/asm/uaccess_mm.h
View File

@ -356,28 +356,23 @@ __constant_copy_to_user(void __user *to, const void *from, unsigned long n)
return res;
}
#define __copy_from_user(to, from, n) \
(__builtin_constant_p(n) ? \
__constant_copy_from_user(to, from, n) : \
__generic_copy_from_user(to, from, n))
#define __copy_to_user(to, from, n) \
(__builtin_constant_p(n) ? \
__constant_copy_to_user(to, from, n) : \
__generic_copy_to_user(to, from, n))
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
static inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (__builtin_constant_p(n))
return __constant_copy_from_user(to, from, n);
return __generic_copy_from_user(to, from, n);
}
static inline unsigned long
copy_from_user(void *to, const void __user *from, unsigned long n)
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
unsigned long res = __copy_from_user_inatomic(to, from, n);
if (unlikely(res))
memset(to + (n - res), 0, res);
return res;
if (__builtin_constant_p(n))
return __constant_copy_to_user(to, from, n);
return __generic_copy_to_user(to, from, n);
}
#define copy_to_user(to, from, n) __copy_to_user(to, from, n)
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
#define user_addr_max() \
(uaccess_kernel() ? ~0UL : TASK_SIZE)

20
arch/m68k/include/asm/uaccess_no.h
View File

@ -101,13 +101,21 @@ extern int __get_user_bad(void);
: "=d" (x) \
: "m" (*__ptr(ptr)))
#define copy_from_user(to, from, n) (memcpy(to, from, n), 0)
#define copy_to_user(to, from, n) (memcpy(to, from, n), 0)
static inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
memcpy(to, (__force const void *)from, n);
return 0;
}
#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
static inline unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
memcpy((__force void *)to, from, n);
return 0;
}
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
/*
* Copy a null terminated string from userspace.