Fixes userspace compile errors like:

error: field ‘sem_perm’ has incomplete type
  struct ipc64_perm sem_perm; /* permissions .. see ipc.h */
error: unknown type name ‘__kernel_time_t’
  __kernel_time_t sem_otime; /* last semop time */

Signed-off-by: Mikko Rapeli <mikko.rap...@iki.fi>
Cc: Al Viro <v...@zeniv.linux.org.uk>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: H. Peter Anvin <h...@zytor.com>
---
 arch/x86/include/uapi/asm/sembuf.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/include/uapi/asm/sembuf.h 
b/arch/x86/include/uapi/asm/sembuf.h
index cc2d6a3aeae7..f11ed5282eec 100644
--- a/arch/x86/include/uapi/asm/sembuf.h
+++ b/arch/x86/include/uapi/asm/sembuf.h
@@ -1,6 +1,9 @@
 #ifndef _ASM_X86_SEMBUF_H
 #define _ASM_X86_SEMBUF_H
 
+#include <linux/types.h>
+#include <linux/ipc.h>
+
 /*
  * The semid64_ds structure for x86 architecture.
  * Note extra padding because this structure is passed back and forth
-- 
2.13.3

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