kernel/seccomp.c includes linux/compat.h and, indicrectly, asm/compat.h
via asm/syscall.h. Due to the duplicated definition of is_compat_task,
compiling this file will fail in the case of !CONFIG_COMPAT.
This patch makes the definition in asm/compat.h valid only if necessary.

Signed-off-by: AKASHI Takahiro <redacted>
---
 arch/arm64/include/asm/compat.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index fda2704..72f3b18 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h

@@ -305,10 +305,12 @@ static inline int is_compat_thread(struct thread_info *thread)
 
 #else /* !CONFIG_COMPAT */
 
+#ifndef is_compat_task /* it's there in linux/compat.h */
 static inline int is_compat_task(void)
 {
 	return 0;
 }
+#endif
 
 static inline int is_compat_thread(struct thread_info *thread)
 {

-- 
1.7.9.5