Re: const versus __attribute__((const))

H. Peter Anvin
2003-12-08T17:50:51Z

Arnd Bergmann wrote:
> H. Peter Anvin writes:
>
>>I have made a patch against the current tree defining
>>__attribute_const__ in <linux/compiler.h> and using it in the above
>>cases; does anyone know any reason why I should *NOT* submit this to
>>Linus?
>
>
> I noticed before that gcc appearantly ignores __attribute__((const))
> for inline functions, so both the original and your proposed code
> is rather pointless as an optimization, except for extern declarations.
>
> I'd rather remove the 'const' completely where it causes warnings for
> inline functions.
>

These functions are available to userspace, though, and can be compiled
with -O0; thus not inlined.

-hpa