[PATCH] kernel.h: Add for_each_if()

[NeilBrown]

On Mon, Jul 16 2018, Andy Shevchenko wrote:

> On Fri, 2018-07-13 at 16:42 -0700, Randy Dunlap wrote:
>> On 07/13/2018 04:37 PM, NeilBrown wrote:
>
>> 
>> coding-style.rst says:
>> Also, use braces when a loop contains more than a single simple
>> statement:
>
> Independently on a) would we use some macro for condition, or b) fix
> macros against this kind of nested conditions, there is another
> weirdness we would like to avoid, i.e.
>
> for_each_foo() {
>  ...
> } else {
>  ...
> }
>
> It is written according to coding style, but too much weird.

Agreed.  Too weird.

>
> So, summarize this discussion I think we would
> - keep for_each_if() in DRM subsystem alone
> - fix macros which are using positive condition 'if (cond)' by replacing
> with 'if (!cond) {} else' form for sake of robustness.
>
> Do you agree on that?

I agree.

Thanks,
NeilBrown
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