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Diffstat (limited to 'arch/s390/include/asm/uaccess.h')
-rw-r--r--arch/s390/include/asm/uaccess.h23
1 files changed, 5 insertions, 18 deletions
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 34268df959a3..9c33ed4e666f 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -252,9 +252,7 @@ static inline unsigned long __must_check
copy_to_user(void __user *to, const void *from, unsigned long n)
{
might_fault();
- if (access_ok(VERIFY_WRITE, to, n))
- n = __copy_to_user(to, from, n);
- return n;
+ return __copy_to_user(to, from, n);
}
/**
@@ -315,11 +313,7 @@ copy_from_user(void *to, const void __user *from, unsigned long n)
copy_from_user_overflow();
return n;
}
- if (access_ok(VERIFY_READ, from, n))
- n = __copy_from_user(to, from, n);
- else
- memset(to, 0, n);
- return n;
+ return __copy_from_user(to, from, n);
}
static inline unsigned long __must_check
@@ -332,9 +326,7 @@ static inline unsigned long __must_check
copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
might_fault();
- if (__access_ok(from,n) && __access_ok(to,n))
- n = __copy_in_user(to, from, n);
- return n;
+ return __copy_in_user(to, from, n);
}
/*
@@ -343,11 +335,8 @@ copy_in_user(void __user *to, const void __user *from, unsigned long n)
static inline long __must_check
strncpy_from_user(char *dst, const char __user *src, long count)
{
- long res = -EFAULT;
might_fault();
- if (access_ok(VERIFY_READ, src, 1))
- res = uaccess.strncpy_from_user(count, src, dst);
- return res;
+ return uaccess.strncpy_from_user(count, src, dst);
}
static inline unsigned long
@@ -387,9 +376,7 @@ static inline unsigned long __must_check
clear_user(void __user *to, unsigned long n)
{
might_fault();
- if (access_ok(VERIFY_WRITE, to, n))
- n = uaccess.clear_user(n, to);
- return n;
+ return uaccess.clear_user(n, to);
}
extern int copy_to_user_real(void __user *dest, void *src, size_t count);