Re: [RESEND PATCH 1/1] bitops.h: move out get_count_order[_long]() from __KERNEL__ scope

[zijun_hu]

On 2016/8/18 1:20, Al Viro wrote:
> On Tue, Aug 16, 2016 at 03:46:22PM +0800, zijun_hu wrote:
>> From: zijun_hu <zijun_hu@xxxxxxx>
>>
>> move out get_count_order[_long]() definitions from scope limited
>> by macro __KERNEL__
>>
>> it not only make both functions available in wider region regardless
>> of whether __KERNEL__ is defined but also keep original region for
>> get_count_order() before the recent commit c513b4cd2fe9
>> ("mm-vmalloc-fix-align-value-calculation-error-v2-fix-fix") 
> 
> What the hell is anything without __KERNEL__ doing with linux/bitops.h in
> the first place?  IOW, why do we have those ifdefs at all?
> 

__KERNEL__ is used to indicate the relevant sections within kernel
headers can't be exported to or used by user space

let me illuminate this patch background firstly
i and Andrew develop another patch to fix a mm issue recently, that
patch move get_count_order() into __KERNEL__ scope, so touch the
function's scope property we don't need to touch or care

the aim of this patch is undoing our unnecessary changes