implement System V shared memory for LTP syscalls

arch/x86/kernel/include/arch/shm.h

@@ -0,0 +1,40 @@
+/**
+ * \file shm.h
+ *  License details are found in the file LICENSE.
+ * \brief
+ *  header file for System V shared memory
+ * \author Gou Nakamura  <go.nakamura.yw@hitachi-solutions.com> \par
+ *  Copyright (C) 2015  RIKEN-AICS
+ */
+/*
+ * HISTORY:
+ */
+
+#ifndef HEADER_ARCH_SHM_H
+#define HEADER_ARCH_SHM_H
+
+struct ipc_perm {
+	key_t		key;
+	uid_t		uid;
+	gid_t		gid;
+	uid_t		cuid;
+	gid_t		cgid;
+	uint16_t	mode;
+	uint8_t		padding[2];
+	uint16_t	seq;
+	uint8_t		padding2[22];
+};
+
+struct shmid_ds {
+	struct ipc_perm	shm_perm;
+	size_t		shm_segsz;
+	time_t		shm_atime;
+	time_t		shm_dtime;
+	time_t		shm_ctime;
+	pid_t		shm_cpid;
+	pid_t		shm_lpid;
+	uint64_t	shm_nattch;
+	uint8_t		padding[16];
+};
+
+#endif /* HEADER_ARCH_SHM_H */