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Date: Fri, 19 Jan 2018 16:53:19 +1100
From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Michael Ellerman <mpe@ellerman.id.au>, Benjamin Herrenschmidt
 <benh@kernel.crashing.org>, PowerPC <linuxppc-dev@lists.ozlabs.org>
Cc: Linux-Next Mailing List <linux-next@vger.kernel.org>, Linux Kernel
 Mailing List <linux-kernel@vger.kernel.org>, Nicholas Piggin
 <npiggin@gmail.com>
Subject: linux-next: build failure after merge of the powerpc tree
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Hi all,

After merging the powerpc tree, today's linux-next build (powerpc64
allnoconfig) failed like this:

arch/powerpc/kernel/mce_power.o: In function `.mce_handle_error':
mce_power.c:(.text+0x5a8): undefined reference to `.hash__tlbiel_all'
mce_power.c:(.text+0x6b8): undefined reference to `.hash__tlbiel_all'
arch/powerpc/mm/hash_utils_64.o: In function `.hash__early_init_mmu':
hash_utils_64.c:(.init.text+0x9d0): undefined reference to `.hash__tlbiel_all'

Caused by commit

  d4748276ae14 ("powerpc/64s: Improve local TLB flush for boot and MCE on POWER9")

The definition of hash__tlbiel_all() is in
arch/powerpc/mm/hash_native_64.c which is only built if CONFIG_PPC_NATIVE
is set, which it is not for this build.

I applied a supplied fix patch.

-- 
Cheers,
Stephen Rothwell