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Date: Thu, 7 Mar 2024 08:24:45 +0000
From: Lee Jones <lee@...nel.org>
To: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Duje Mihanović <duje.mihanovic@...le.hr>,
	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 backlight tree

On Wed, 06 Mar 2024, Stephen Rothwell wrote:

> Hi Lee,
> 
> On Wed, 6 Mar 2024 09:55:39 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > On Tue, 5 Mar 2024 09:17:37 +0000 Lee Jones <lee@...nel.org> wrote:
> > > On Tue, 05 Mar 2024, Stephen Rothwell wrote:  
> > > > On Mon, 26 Feb 2024 13:28:28 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:    
> > > > >
> > > > > After merging the backlight tree, today's linux-next build (x86_64
> > > > > allmodconfig) failed like this:
> > > > > 
> > > > > drivers/video/backlight/ktd2801-backlight.c:8:10: fatal error: linux/leds-expresswire.h: No such file or directory
> > > > >     8 | #include <linux/leds-expresswire.h>
> > > > >       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~
> > > > > 
> > > > > Caused by commit
> > > > > 
> > > > >   48749e2f14e3 ("backlight: Add Kinetic KTD2801 backlight support")
> > > > > 
> > > > > I have used the backlight tree from next-20240223 for today.    
> > > > 
> > > > I am still getting this failure.    
> > > 
> > > I just pushed a bunch of patches.  
> > 
> > I saw only 3 new ones (forgot to push?) none of which addressed this
> > problem.
> > 
> > > Please let me know if this is still an issue tomorrow.  
> > 
> > The problem is that after Feb 23, you rebased your tree and dropped commit
> > 
> >   25ae5f5f4168 ("leds: Introduce ExpressWire library")
> > 
> > which (added the leds-expresswire.h header), but kept commit
> > 
> >   48749e2f14e3 ("backlight: Add Kinetic KTD2801 backlight support")
> > 
> > which uses it.
> 
> Now I see what happened.  I have 2 trees from you, the backlight tree
> (git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git#for-backlight-next)
> and the leds-lj tree
> (git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git#for-leds-next)
> and the former implicitly depends on the latter (and I merge the
> backlight tree first).  You should make that dependency explicit by
> merging (part of) the latter into the former (or something).

Right.  So you build each tree as its merged?

My assumption was that all things come together in -next?

-- 
Lee Jones [李琼斯]

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