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x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()

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Commit ff47ab4ff3 "x86: Add 1/2/4/8 byte optimization to 64bit
__copy_{from,to}_user_inatomic" added a "_nocheck" call in between
the copy_to/from_user() and copy_user_generic(). As both the
normal and nocheck versions of theses calls use the proper __user
annotation, a typecast to remove it should not be added.
This causes sparse to spin out the following warnings:

arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>
arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces)
arch/x86/include/asm/uaccess_64.h:207:47:    expected void const [noderef] <asn:1>*src
arch/x86/include/asm/uaccess_64.h:207:47:    got void const *<noident>

Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140103164500.5f6478f5@gandalf.local.home
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Steven Rostedt 2014-01-03 16:45:00 -05:00 • committed by H. Peter Anvin
parent 802eee95bd
commit df90ca9690
1 changed files with 2 additions and 2 deletions
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4
arch/x86/include/asm/uaccess_64.h
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@ -204,13 +204,13 @@ int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
static __must_check __always_inline int static __must_check __always_inline int
__copy_from_user_inatomic(void *dst, const void __user *src, unsigned size) __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size)
{ {
return __copy_from_user_nocheck(dst, (__force const void *)src, size); return __copy_from_user_nocheck(dst, src, size);
} }
static __must_check __always_inline int static __must_check __always_inline int
__copy_to_user_inatomic(void __user *dst, const void *src, unsigned size) __copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
{ {
return __copy_to_user_nocheck((__force void *)dst, src, size); return __copy_to_user_nocheck(dst, src, size);
} }
extern long __copy_user_nocache(void *dst, const void __user *src, extern long __copy_user_nocache(void *dst, const void __user *src,