linux-next: build failure after merge of the akpm-current tree

Stephen Rothwell
2017-08-28T08:18:49Z

Hi Andrew,

After merging the akpm-current tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

kernel/fork.c: In function 'mm_init':
kernel/fork.c:821:2: 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:900:2: error: implicit declaration of function 'hmm_mm_destroy' [-Werror=implicit-function-declaration]
hmm_mm_destroy(mm);
^

Caused by commit

af097d7ae64e ("mm/hmm: struct hmm is only use by HMM mirror functionality v2")

I added the following patch for today:

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Mon, 28 Aug 2017 18:14:09 +1000
Subject: [PATCH] mm/hmm: struct hmm is only use by HMM mirror functionality v2 fix

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
include/linux/hmm.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/include/linux/hmm.h b/include/linux/hmm.h
index 9583d9a15f9c..0758072f6585 100644
--- a/include/linux/hmm.h
+++ b/include/linux/hmm.h
@@ -514,5 +514,8 @@ static inline void hmm_mm_init(struct mm_struct *mm) {}
#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */

+#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) */
#endif /* LINUX_HMM_H */
--
2.13.2

--
Cheers,
Stephen Rothwell