[PATCH] sparse: update __builtin_object_size() prototype

[Lance Richardson <lrichard@redhat.com>]

Sparse emits a large number of warnings for the linux kernel source
tree of the form:
    ./arch/x86/include/asm/uaccess.h:735:18: \
        warning: incorrect type in argument 1 (different modifiers)
    ./arch/x86/include/asm/uaccess.h:735:18:    expected void *<noident>
    ./arch/x86/include/asm/uaccess.h:735:18:    got void const *from

Fix by making the first parameter to __builtin_object_size()
type "const void *" instead of "void *", which is consistent with GCC
behavior (the prototype for this builtin in GCC documentation is evidently
incorrect).

Signed-off-by: Lance Richardson <lrichard@redhat.com>
---
 lib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib.c b/lib.c
index aa2af68..122dd6f 100644
--- a/lib.c
+++ b/lib.c
@@ -917,7 +917,7 @@ 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");
-- 
2.5.5