On Fri 25-08-17 16:50:26, Randy Dunlap wrote:

On 08/25/17 15:50, akpm@linux-foundation.org wrote:

quoted

The mm-of-the-moment snapshot 2017-08-25-15-50 has been uploaded to

   http://www.ozlabs.org/~akpm/mmotm/

mmotm-readme.txt says

README for mm-of-the-moment:

http://www.ozlabs.org/~akpm/mmotm/

This is a snapshot of my -mm patch queue.  Uploaded at random hopefully
more than once a week.

lots of this one (on x86_64, i386, or UML):

../kernel/fork.c:818:2: error: implicit declaration of function 'hmm_mm_init' [-Werror=implicit-function-declaration]
../kernel/fork.c:897:2: error: implicit declaration of function 'hmm_mm_destroy' [-Werror=implicit-function-declaration]

from mm-hmm-heterogeneous-memory-management-hmm-for-short-v5.patch

Cc: Jérôme Glisse <redacted>

This one should address it
---

From 31d551dbcb1b7987a4cd07767c1e2805849b7a26 Mon Sep 17 00:00:00 2001

From: Michal Hocko <mhocko@suse.com>
Date: Mon, 28 Aug 2017 09:41:39 +0200
Subject: [PATCH] 
 mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2-fix

Compiler is complaining for allnoconfig

kernel/fork.c: In function 'mm_init':
kernel/fork.c:814:2: error: implicit declaration of function 'hmm_mm_init' [-Werror=implicit-function-declaration]
  hmm_mm_init(mm);
  ^
kernel/fork.c: In function '__mmdrop':
kernel/fork.c:893:2: error: implicit declaration of function 'hmm_mm_destroy' [-Werror=implicit-function-declaration]
  hmm_mm_destroy(mm);

Make sure that hmm_mm_init/hmm_mm_destroy empty stups are defined when
CONFIG_HMM is disabled.

Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 include/linux/hmm.h | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/linux/hmm.h b/include/linux/hmm.h
index 9583d9a15f9c..aeb94e682dda 100644
--- a/include/linux/hmm.h
+++ b/include/linux/hmm.h

@@ -508,11 +508,10 @@ static inline void hmm_mm_init(struct mm_struct *mm)
 {
 	mm->hmm = NULL;
 }
-#else /* IS_ENABLED(CONFIG_HMM_MIRROR) */
+#endif
+
+#else /* IS_ENABLED(CONFIG_HMM) */
 static inline void hmm_mm_destroy(struct mm_struct *mm) {}
 static inline void hmm_mm_init(struct mm_struct *mm) {}
-#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */
-
-
 #endif /* IS_ENABLED(CONFIG_HMM) */
 #endif /* LINUX_HMM_H */

-- 
2.13.2

-- 
Michal Hocko
SUSE Labs

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