Re: 3.15-rc6 build / link failed fs/built-in mb_cache_entry problems

[Randy Dunlap <rdunlap@infradead.org>]

On 05/28/2014 01:48 PM, werner wrote:
> Oi think im using 4.2.4 . but the kernel should be programmed clean, so that it builds with all not-too-old versions.
> 
> wl
> 

Hi Werner,
Please reply to the mailing list also (as I am doing).

I asked Thavatchai for a patch to fix this.

> 
> 
> n Tue, 27 May 2014 15:51:26 -0700
>  Randy Dunlap <rdunlap@infradead.org> wrote:
>> On 05/27/2014 03:22 PM, Thavatchai Makphaibulchoke wrote:
>>> On 05/26/2014 11:04 PM, Randy Dunlap wrote:
>>>> On 05/26/2014 11:17 AM, werner wrote:
>>>> @tmac:  can mbcache.c #include <linux/log2.h> and use ilog2(NR_BG_LOCKS)
>>>> instead of using __builtin_log2(NR_BG_LOCKS) ?
>>>> (ref. commit ID 1f3e55fe02d12213f87869768aa2b0bad3ba9a7d)
>>>>
>>>
>>> I don't see any problem with that, unless somebody else has any concern.  Please let me know if you'd like me to submit the change.
>>
>> I'd say yes since some gcc version(s) don't seem to support __builtin_log2().
>>
>> -- 
>> ~Randy
>>
>>
> 
> "werner" <w.landgraf@ru.ru>
> ---
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-- 
~Randy