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ia64 broken by transparent huge pages - other arches too?

From:  "Luck, Tony" <tony.luck-AT-intel.com>
To:  "Andrea Arcangeli" <aarcange-AT-redhat.com>
Subject:  ia64 broken by transparent huge pages - other arches too?
Date:  Fri, 14 Jan 2011 09:50:45 -0800
Message-ID:  <4d308cf5394566ccc@agluck-desktop.sc.intel.com>
Cc:  linux-kernel-AT-vger.kernel.org, "Andrew Morton" <akpm-AT-linux-foundation.org>, linux-arch-AT-vger.kernel.org
Archive-link:  Article

Didn't Andrew make some rash promise at kernel summit about stopping
eating if "-mm" wasn't included in linux-next by the end of November?

Must be getting pretty hungry by now.

The transparent huge page code just arrived in the merge window
without having been in linux-next.  I see this error when trying
to build for ia64 from Linus' tree this morning:

In file included from /home/aegl/generic-smp/arch/ia64/include/asm/pgtable.h:611,
                 from include/linux/mm.h:41,
                 from /home/aegl/generic-smp/arch/ia64/include/asm/uaccess.h:39,
                 from include/linux/poll.h:14,
                 from include/linux/rtc.h:117,
                 from include/linux/efi.h:19,
                 from /home/aegl/generic-smp/arch/ia64/include/asm/sal.h:40,
                 from /home/aegl/generic-smp/arch/ia64/include/asm/mca.h:20,
                 from arch/ia64/kernel/asm-offsets.c:17:
include/asm-generic/pgtable.h: In function ‘pmdp_get_and_clear':
include/asm-generic/pgtable.h:96: error: implicit declaration of function ‘__pmd'
include/asm-generic/pgtable.h:96: error: incompatible types in return
make[1]: *** [arch/ia64/kernel/asm-offsets.s] Error 1


Looks like arch/*/include/pgtable.h needs to define __pmd() but only x86
was blessed with it.

-Tony


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