Re: Assuming NULL

[Willy Tarreau <willy@w.ods.org>]

Hi Jan,

On Sat, Jun 11, 2005 at 06:24:22PM +0200, Jan Engelhardt wrote:
(...)
> My question is: Which one is right wrt the case "i_op ==/!= NULL"?
> There are two ways:
> 
> - the kernel assumes i_op (and similar) is always non-NULL
>   => then we can remove a lot of checks, like the first example above
> 
> - the kernel does not assume...
>   => then we need some extra checks, like in the second example above

and in any case, adding a comment telling why it CAN or why it CANNOT
be NULL would prevent other people from having to redo the same work
in 6 months.

Willy