I'm seeing these warnings with current Linux:
./arch/x86/include/asm/uaccess.h:705:18: warning: incorrect type in argument 1 (different modifiers)
./arch/x86/include/asm/uaccess.h:705:18: expected void *<noident>
./arch/x86/include/asm/uaccess.h:705:18: got void const *from
Because of this code:
static __always_inline unsigned long __must_check
copy_to_user(void __user *to, const void *from, unsigned long n)
{
int sz = __compiletime_object_size(from);
...
}
where we have
# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
to fix, mark the argument as const void *.
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
Sorry if this has already been reported/fixed.
lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib.c b/lib.c
index d5b56b0..2d66aa0 100644
--- a/lib.c
+++ b/lib.c
@@ -888,7 +888,7 @@ void declare_builtin_functions(void)
add_pre_buffer("extern long double __builtin_nanl(const char *);\n");
/* And some __FORTIFY_SOURCE ones.. */
- add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(void *, int);\n");
+ add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(const void *, int);\n");
add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
--
MST
--
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