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To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 LKML <linux-kernel@vger.kernel.org>
Cc: Mikhail Nosov <drdeimosnn@gmail.com>, Arnd Bergmann <arnd@arndb.de>,
 =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>,
 Andrew Morton <akpm@linux-foundation.org>,
 Linus Torvalds <torvalds@linux-foundation.org>
From: Randy Dunlap <rdunlap@infradead.org>
Subject: stable 4.16.5 hmm build error
Message-ID: <d5e6a41a-2fb2-7f7c-5b8e-65dba4b8c356@infradead.org>
Date: Thu, 26 Apr 2018 14:52:26 -0700
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https://bugzilla.kernel.org/show_bug.cgi?id=199515

kernel/fork.o: In function `__mmdrop':
/kernel/build_kernel/linux-4.16.4/kernel/fork.c:600: undefined reference to `hmm_mm_destroy'

"It is also reproduced in linux-4.16.5"


There have been a few attempts to fix this build error.  The kernel mainline
repo seems to have it fixed, but it looks to me like Arnd's latest patch
(9d8a463a7016e: "mm/hmm: fix header file if/else/endif maze, again")
was mis-merged to 4.16.5 stable.

Please take a look.  Do you already have a fixup for this?

thanks,
-- 
~Randy