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Date:   Thu, 29 Oct 2020 13:08:20 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the akpm-current tree

On Thu, Oct 29, 2020 at 03:08:09PM +1100, Stephen Rothwell wrote:
> After merging the akpm-current tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> lib/math/div64.c: In function 'mul_u64_u64_div_u64':
> lib/math/div64.c:202:6: error: implicit declaration of function 'ilog2' [-Werror=implicit-function-declaration]
>   202 |  if (ilog2(a) + ilog2(b) > 62) {
>       |      ^~~~~
> 
> Caused by commit
> 
>   4ec993a18ff6 ("kernel.h: Split out mathematical helpers")
> 
> I have applied the following patch for today:

Right, thanks! It seems x86 has this inclusion somewhere else and my patch
reveals this on PPC which has cleaner inclusion chain.

Andrew, can you attach this fix to your tree?

-- 
With Best Regards,
Andy Shevchenko


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