Re: const versus __attribute__((const))

[Nikita Danilov]

H. Peter Anvin writes:
 > 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.

And future versions of gcc can be smarter.

 > 
 > 	-hpa

Nikita.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/