Subject: Re: linux-next: build failure after merge of the final tree (tip/s390 trees related)

From: Ingo Molnar <[email-masked]>
Date: Sat, 20 Oct 2012 00:43:45 +0200

* Stephen Rothwell <[email-masked]> wrote:

> Hi Ingo,
> 
> On Thu, 18 Oct 2012 20:29:53 +0200 Ingo Molnar <[email-masked]> wrote:
> >
> > * Stephen Rothwell <[email-masked]> wrote:
> > > 
> > > After merging the final tree, today's linux-next build (s390 allyesconfig)
> > > failed like this:
> > > 
> > > mm/huge_memory.c:1424:2: error: implicit declaration of function 'pmd_pgprot' [-Werror=implicit-function-declaration]
> > > mm/huge_memory.c:1424:7: error: incompatible types when assigning to type 'pgprot_t' from type 'int'
> > > 
> > > (see http://kisskb.ellerman.id.au/kisskb/buildresult/7383823/)
> > > 
> > > Caused by commit 35d3d3427314 ("s390/thp: select
> > > HAVE_ARCH_TRANSPARENT_HUGEPAGE") from the s390 tree interacting with
> > > commit 93c9d633bd9e ("mm/thp: Preserve pgprot across huge page split")
> > > from the tip tree.
> > > 
> > > N.B. Mips also selects HAVE_ARCH_TRANSPARENT_HUGEPAGE as of commit
> > > e21a828a1bba ("MIPS: Transparent Huge Pages support") from the mips tree
> > > and so will be broken in some configs now as well.
> > > 
> > > Anyone have suggested merge fix patches I can apply?
> > 
> > Resolved it for now by excluding those changes, will put them 
> > back in once they are fixed.
> 
> It looks as though you have not gone back far enough - you 
> removed a couple of merges of sched/numa, but there are more. 
> I have two of the problems resolved with merge patches that 
> supply pmd_pgprot() for s390 and mips, but there is another 
> problem with mips (see Ralf's other email).

Yeah. All of this should be resolved now in principle. Next time 
you'll integrate linux-next is on Monday, right?

Thanks,

	Ingo