Re: linux-next: build failure after merge of the block tree

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On Wed, 27 Apr 2016, Michal Marek wrote:

> On 2016-04-26 22:48, Nicolas Pitre wrote:
> > On Wed, 27 Apr 2016, Stephen Rothwell wrote:
> > 
> >> Hi Nicolas,
> >>
> >> On Tue, 26 Apr 2016 10:40:57 -0400 (EDT) Nicolas Pitre <nicolas.pitre@xxxxxxxxxx> wrote:
> >>>
> >>> If you can reproduce this build failure, could you try a make mrproper 
> >>> and attempt it again?  I, too, would like to find an explanation and a 
> >>> way to reproduce.
> >>
> >> I reset my build tree to commit 9d67df654092 ("Merge remote-tracking
> >> branch 'block/for-next'") and the build failed with:
> >>
> >> ERROR: ".local_clock" [drivers/vhost/vhost_net.ko] undefined!
> >> ERROR: ".local_clock" [drivers/misc/cxl/cxl.ko] undefined!
> >>
> >> :-(
> >>
> >> So I did a "make mrproper" and did the build again.
> >>
> >> That built correctly.
> >>
> > [...]
> > 
> > OK!  After digging and diffing through 750 megabytes of make debug logs 
> > I finally found the explanation.  The if_changed directive is useless 
> > against phony targets.
> > 
> > @Stephen: could you replace the revert with the patch below in your tree?
> > 
> > @Michal: could you fold the patch below into commit 2441e78b19 in your tree?
> 
> I prefer not to overwrite the topic branches unless necessary and I
> wanted to credit Stephen, so I committed your patch with a fabricated
> commit message and your signoff (since you wanted to fold it into a
> patch that you had already signed off).

Fine with me.


Nicolas
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