Re: [PATCH] likely cleanup: remove unlikely for kfree(NULL)

[Arjan van de Ven <arjan@infradead.org>]

On Wed, 2006-04-26 at 12:05 +0200, Jörn Engel wrote:
> On Wed, 26 April 2006 10:27:18 +0200, Arjan van de Ven wrote:
> > 
> > what I would like is kfree to become an inline wrapper that does the
> > null check inline, that way gcc can optimize it out (and it will in 4.1
> > with the VRP pass) if gcc can prove it's not NULL.
> 
> How well can gcc optimize this case? 

if you deref'd the pointer it'll optimize it away (assuming a new enough
gcc, like 4.1)


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