[PATCH] mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2-fix

[Michal Hocko]

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@xxxxxxxx>
---
 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