Merge branch 'x86-uaccess-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

Pull x86 uaccess changes from Ingo Molnar:
 "A single change that micro-optimizes __copy_*_user_inatomic(), used by
  the futex code"

* 'x86-uaccess-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Add 1/2/4/8 byte optimization to 64bit __copy_{from,to}_user_inatomic

diff --cc arch/x86/include/asm/uaccess_64.h
index 0acae71,64476bb..190413d
--- 1/arch/x86/include/asm/uaccess_64.h
--- 2/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@@ -46,10 -46,38 +46,10 @@@ copy_user_generic(void *to, const void 
  }
  
  __must_check unsigned long
 -_copy_to_user(void __user *to, const void *from, unsigned len);
 -__must_check unsigned long
 -_copy_from_user(void *to, const void __user *from, unsigned len);
 -__must_check unsigned long
  copy_in_user(void __user *to, const void __user *from, unsigned len);
  
 -static inline unsigned long __must_check copy_from_user(void *to,
 -                                        const void __user *from,
 -                                        unsigned long n)
 -{
 -      int sz = __compiletime_object_size(to);
 -
 -      might_fault();
 -      if (likely(sz == -1 || sz >= n))
 -              n = _copy_from_user(to, from, n);
 -#ifdef CONFIG_DEBUG_VM
 -      else
 -              WARN(1, "Buffer overflow detected!\n");
 -#endif
 -      return n;
 -}
 -
 -static __always_inline __must_check
 -int copy_to_user(void __user *dst, const void *src, unsigned size)
 -{
 -      might_fault();
 -
 -      return _copy_to_user(dst, src, size);
 -}
 -
  static __always_inline __must_check
- int __copy_from_user(void *dst, const void __user *src, unsigned size)
+ int __copy_from_user_nocheck(void *dst, const void __user *src, unsigned size)
  {
        int ret = 0;