Re: [PATCH] crc32: remove useless __pure modifier from functions

[Pekka Enberg]

On Mon, 2009-03-02 at 12:50 -0300, Thiago Galesi wrote:
> Actually, the effects of most keywords (like const, etc) affect things
> outside of the module (the callers)
> 
> http://gcc.gnu.org/onlinedocs/gcc-4.2.0/gcc/Function-Attributes.html
> has a good explanation.
> 
> Briefly, a _pure function only depends on its parameters and the only
> return is via the function return, so the compiler can optimize some
> of its calls away.

Hmm. They're not marked as pure in the header files. Does GCC look it up
from the object file or something for this...?

			Pekka

--
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/