diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index d047b61af7..ff4535cdca 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -42,7 +42,8 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
 		  bits/mman-linux.h bits/mman-shared.h bits/ptrace-shared.h \
 		  bits/siginfo-arch.h bits/siginfo-consts-arch.h \
 		  bits/procfs.h bits/procfs-id.h bits/procfs-extra.h \
-		  bits/procfs-prregset.h bits/mman-map-flags-generic.h
+		  bits/procfs-prregset.h bits/mman-map-flags-generic.h \
+		  bits/msq-pad.h
 
 tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
 	 tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
diff --git a/sysdeps/unix/sysv/linux/bits/msq-pad.h b/sysdeps/unix/sysv/linux/bits/msq-pad.h
new file mode 100644
index 0000000000..97dee0beff
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/bits/msq-pad.h
@@ -0,0 +1,31 @@
+/* Define where padding goes in struct msqid_ds.  Generic version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_MSG_H
+# error "Never use <bits/msq-pad.h> directly; include <sys/msg.h> instead."
+#endif
+
+#include <bits/wordsize.h>
+
+/* On most architectures, padding goes after time fields for 32-bit
+   systems and is omitted for 64-bit systems.  Some architectures pad
+   before time fields instead, or omit padding despite being
+   32-bit.  */
+
+#define __MSQ_PAD_AFTER_TIME (__WORDSIZE == 32)
+#define __MSQ_PAD_BEFORE_TIME 0
diff --git a/sysdeps/unix/sysv/linux/bits/msq.h b/sysdeps/unix/sysv/linux/bits/msq.h
index 0fe85e578d..a35e842a4b 100644
--- a/sysdeps/unix/sysv/linux/bits/msq.h
+++ b/sysdeps/unix/sysv/linux/bits/msq.h
@@ -20,7 +20,7 @@
 #endif
 
 #include <bits/types.h>
-#include <bits/wordsize.h>
+#include <bits/msq-pad.h>
 
 /* Define options for message queue functions.  */
 #define MSG_NOERROR	010000	/* no error if message is too big */
@@ -30,34 +30,35 @@
 #endif
 
 /* Types used in the structure definition.  */
-typedef unsigned long int msgqnum_t;
-typedef unsigned long int msglen_t;
+typedef __syscall_ulong_t msgqnum_t;
+typedef __syscall_ulong_t msglen_t;
 
+#if __MSQ_PAD_BEFORE_TIME
+# define __MSQ_PAD_TIME(NAME, RES)				\
+  __syscall_ulong_t __glibc_reserved ## RES; __time_t NAME
+#elif __MSQ_PAD_AFTER_TIME
+# define __MSQ_PAD_TIME(NAME, RES)				\
+  __time_t NAME; __syscall_ulong_t __glibc_reserved ## RES
+#else
+# define __MSQ_PAD_TIME(NAME, RES)		\
+  __time_t NAME
+#endif
 
 /* Structure of record for one message inside the kernel.
    The type `struct msg' is opaque.  */
 struct msqid_ds
 {
   struct ipc_perm msg_perm;	/* structure describing operation permission */
-  __time_t msg_stime;		/* time of last msgsnd command */
-#if __WORDSIZE == 32
-  unsigned long int __glibc_reserved1;
-#endif
-  __time_t msg_rtime;		/* time of last msgrcv command */
-#if __WORDSIZE == 32
-  unsigned long int __glibc_reserved2;
-#endif
-  __time_t msg_ctime;		/* time of last change */
-#if __WORDSIZE == 32
-  unsigned long int __glibc_reserved3;
-#endif
-  unsigned long int __msg_cbytes; /* current number of bytes on queue */
+  __MSQ_PAD_TIME (msg_stime, 1);	/* time of last msgsnd command */
+  __MSQ_PAD_TIME (msg_rtime, 2);	/* time of last msgrcv command */
+  __MSQ_PAD_TIME (msg_ctime, 3);	/* time of last change */
+  __syscall_ulong_t __msg_cbytes; /* current number of bytes on queue */
   msgqnum_t msg_qnum;		/* number of messages currently on queue */
   msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
   __pid_t msg_lspid;		/* pid of last msgsnd() */
   __pid_t msg_lrpid;		/* pid of last msgrcv() */
-  unsigned long int __glibc_reserved4;
-  unsigned long int __glibc_reserved5;
+  __syscall_ulong_t __glibc_reserved4;
+  __syscall_ulong_t __glibc_reserved5;
 };
 
 #ifdef __USE_MISC
diff --git a/sysdeps/unix/sysv/linux/hppa/bits/msq-pad.h b/sysdeps/unix/sysv/linux/hppa/bits/msq-pad.h
new file mode 100644
index 0000000000..10b26b7ea6
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/hppa/bits/msq-pad.h
@@ -0,0 +1,26 @@
+/* Define where padding goes in struct msqid_ds.  HPPA version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_MSG_H
+# error "Never use <bits/msq-pad.h> directly; include <sys/msg.h> instead."
+#endif
+
+#include <bits/wordsize.h>
+
+#define __MSQ_PAD_AFTER_TIME 0
+#define __MSQ_PAD_BEFORE_TIME (__WORDSIZE == 32)
diff --git a/sysdeps/unix/sysv/linux/hppa/bits/msq.h b/sysdeps/unix/sysv/linux/hppa/bits/msq.h
deleted file mode 100644
index b0cfb591e9..0000000000
--- a/sysdeps/unix/sysv/linux/hppa/bits/msq.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_MSG_H
-# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
-#endif
-
-#include <bits/types.h>
-#include <bits/wordsize.h>
-
-/* Define options for message queue functions.  */
-#define MSG_NOERROR	010000	/* no error if message is too big */
-#ifdef __USE_GNU
-# define MSG_EXCEPT	020000	/* recv any msg except of specified type */
-# define MSG_COPY	040000	/* copy (not remove) all queue messages */
-#endif
-
-/* Types used in the structure definition.  */
-typedef unsigned long int msgqnum_t;
-typedef unsigned long int msglen_t;
-
-
-/* Structure of record for one message inside the kernel.
-   The type `struct msg' is opaque.  */
-struct msqid_ds
-{
-  struct ipc_perm msg_perm;	/* structure describing operation permission */
-#if __WORDSIZE == 32
-  unsigned int __pad1;
-#endif
-  __time_t msg_stime;		/* time of last msgsnd command */
-#if __WORDSIZE == 32
-  unsigned int __pad2;
-#endif
-  __time_t msg_rtime;		/* time of last msgrcv command */
-#if __WORDSIZE == 32
-  unsigned int __pad3;
-#endif
-  __time_t msg_ctime;		/* time of last change */
-  unsigned long int __msg_cbytes; /* current number of bytes on queue */
-  msgqnum_t msg_qnum;		/* number of messages currently on queue */
-  msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
-  __pid_t msg_lspid;		/* pid of last msgsnd() */
-  __pid_t msg_lrpid;		/* pid of last msgrcv() */
-  unsigned long int __glibc_reserved1;
-  unsigned long int __glibc_reserved2;
-};
-
-#ifdef __USE_MISC
-
-# define msg_cbytes	__msg_cbytes
-
-/* ipcs ctl commands */
-# define MSG_STAT 11
-# define MSG_INFO 12
-# define MSG_STAT_ANY 13
-
-/* buffer for msgctl calls IPC_INFO, MSG_INFO */
-struct msginfo
-  {
-    int msgpool;
-    int msgmap;
-    int msgmax;
-    int msgmnb;
-    int msgmni;
-    int msgssz;
-    int msgtql;
-    unsigned short int msgseg;
-  };
-
-#endif /* __USE_MISC */
diff --git a/sysdeps/unix/sysv/linux/mips/bits/msq-pad.h b/sysdeps/unix/sysv/linux/mips/bits/msq-pad.h
new file mode 100644
index 0000000000..1ddfb0d271
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/bits/msq-pad.h
@@ -0,0 +1,31 @@
+/* Define where padding goes in struct msqid_ds.  MIPS version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_MSG_H
+# error "Never use <bits/msq-pad.h> directly; include <sys/msg.h> instead."
+#endif
+
+#include <bits/wordsize.h>
+
+#ifdef __MIPSEL__
+# define __MSQ_PAD_AFTER_TIME (__WORDSIZE == 32)
+# define __MSQ_PAD_BEFORE_TIME 0
+#else
+# define __MSQ_PAD_AFTER_TIME 0
+# define __MSQ_PAD_BEFORE_TIME (__WORDSIZE == 32)
+#endif
diff --git a/sysdeps/unix/sysv/linux/mips/bits/msq.h b/sysdeps/unix/sysv/linux/mips/bits/msq.h
deleted file mode 100644
index 9999aa99db..0000000000
--- a/sysdeps/unix/sysv/linux/mips/bits/msq.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_MSG_H
-# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
-#endif
-
-#include <bits/types.h>
-
-/* Define options for message queue functions.  */
-#define MSG_NOERROR	010000	/* no error if message is too big */
-#ifdef __USE_GNU
-# define MSG_EXCEPT	020000	/* recv any msg except of specified type */
-# define MSG_COPY	040000	/* copy (not remove) all queue messages */
-#endif
-
-/* Types used in the structure definition.  */
-typedef unsigned long int msgqnum_t;
-typedef unsigned long int msglen_t;
-
-
-/* Structure of record for one message inside the kernel.
-   The type `struct msg' is opaque.  */
-struct msqid_ds
-{
-  struct ipc_perm msg_perm;	/* structure describing operation permission */
-#if __WORDSIZE == 32 && defined (__MIPSEB__)
-  unsigned long int __glibc_reserved1;
-#endif
-  __time_t msg_stime;		/* time of last msgsnd command */
-#if __WORDSIZE == 32 && defined (__MIPSEL__)
-  unsigned long int __glibc_reserved1;
-#endif
-#if __WORDSIZE == 32 && defined (__MIPSEB__)
-  unsigned long int __glibc_reserved2;
-#endif
-  __time_t msg_rtime;		/* time of last msgrcv command */
-#if __WORDSIZE == 32 && defined (__MIPSEL__)
-  unsigned long int __glibc_reserved2;
-#endif
-#if __WORDSIZE == 32 && defined (__MIPSEB__)
-  unsigned long int __glibc_reserved3;
-#endif
-  __time_t msg_ctime;		/* time of last change */
-#if __WORDSIZE == 32 && defined (__MIPSEL__)
-  unsigned long int __glibc_reserved3;
-#endif
-  unsigned long int __msg_cbytes; /* current number of bytes on queue */
-  msgqnum_t msg_qnum;		/* number of messages currently on queue */
-  msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
-  __pid_t msg_lspid;		/* pid of last msgsnd() */
-  __pid_t msg_lrpid;		/* pid of last msgrcv() */
-  unsigned long int __glibc_reserved4;
-  unsigned long int __glibc_reserved5;
-};
-
-#ifdef __USE_MISC
-
-# define msg_cbytes	__msg_cbytes
-
-/* ipcs ctl commands */
-# define MSG_STAT 11
-# define MSG_INFO 12
-# define MSG_STAT_ANY 13
-
-/* buffer for msgctl calls IPC_INFO, MSG_INFO */
-struct msginfo
-  {
-    int msgpool;
-    int msgmap;
-    int msgmax;
-    int msgmnb;
-    int msgmni;
-    int msgssz;
-    int msgtql;
-    unsigned short int msgseg;
-  };
-
-#endif /* __USE_MISC */
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/msq-pad.h b/sysdeps/unix/sysv/linux/powerpc/bits/msq-pad.h
new file mode 100644
index 0000000000..9680176abb
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/msq-pad.h
@@ -0,0 +1,26 @@
+/* Define where padding goes in struct msqid_ds.  PowerPC version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_MSG_H
+# error "Never use <bits/msq-pad.h> directly; include <sys/msg.h> instead."
+#endif
+
+#include <bits/wordsize.h>
+
+#define __MSQ_PAD_AFTER_TIME 0
+#define __MSQ_PAD_BEFORE_TIME (__WORDSIZE == 32)
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/msq.h b/sysdeps/unix/sysv/linux/powerpc/bits/msq.h
deleted file mode 100644
index b98d293d54..0000000000
--- a/sysdeps/unix/sysv/linux/powerpc/bits/msq.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_MSG_H
-# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
-#endif
-
-#include <bits/types.h>
-
-/* Define options for message queue functions.  */
-#define MSG_NOERROR    010000  /* no error if message is too big */
-#ifdef __USE_GNU
-# define MSG_EXCEPT    020000  /* recv any msg except of specified type */
-# define MSG_COPY	040000	/* copy (not remove) all queue messages */
-#endif
-
-/* Types used in the structure definition.  */
-typedef unsigned long int msgqnum_t;
-typedef unsigned long int msglen_t;
-
-
-/* Structure of record for one message inside the kernel.
-   The type `struct msg' is opaque.  */
-struct msqid_ds
-{
-  struct ipc_perm msg_perm;    /* structure describing operation permission */
-#if __WORDSIZE == 32
-  unsigned int __glibc_reserved1;
-#endif
-  __time_t msg_stime;          /* time of last msgsnd command */
-#if __WORDSIZE == 32
-  unsigned int __glibc_reserved2;
-#endif
-  __time_t msg_rtime;          /* time of last msgrcv command */
-#if __WORDSIZE == 32
-  unsigned int __glibc_reserved3;
-#endif
-  __time_t msg_ctime;          /* time of last change */
-  unsigned long __msg_cbytes; /* current number of bytes on queue */
-  msgqnum_t msg_qnum;          /* number of messages currently on queue */
-  msglen_t msg_qbytes;         /* max number of bytes allowed on queue */
-  __pid_t msg_lspid;           /* pid of last msgsnd() */
-  __pid_t msg_lrpid;           /* pid of last msgrcv() */
-  unsigned long __glibc_reserved4;
-  unsigned long __glibc_reserved5;
-};
-
-#ifdef __USE_MISC
-
-# define msg_cbytes    __msg_cbytes
-
-/* ipcs ctl commands */
-# define MSG_STAT 11
-# define MSG_INFO 12
-# define MSG_STAT_ANY 13
-
-/* buffer for msgctl calls IPC_INFO, MSG_INFO */
-struct msginfo
-  {
-    int msgpool;
-    int msgmap;
-    int msgmax;
-    int msgmnb;
-    int msgmni;
-    int msgssz;
-    int msgtql;
-    unsigned short int msgseg;
-  };
-
-#endif /* __USE_MISC */
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/msq-pad.h b/sysdeps/unix/sysv/linux/sparc/bits/msq-pad.h
new file mode 100644
index 0000000000..3dfeb07a48
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/bits/msq-pad.h
@@ -0,0 +1,26 @@
+/* Define where padding goes in struct msqid_ds.  SPARC version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_MSG_H
+# error "Never use <bits/msq-pad.h> directly; include <sys/msg.h> instead."
+#endif
+
+#include <bits/wordsize.h>
+
+#define __MSQ_PAD_AFTER_TIME 0
+#define __MSQ_PAD_BEFORE_TIME (__WORDSIZE == 32)
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/msq.h b/sysdeps/unix/sysv/linux/sparc/bits/msq.h
deleted file mode 100644
index 68a280c1ae..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/bits/msq.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_MSG_H
-# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
-#endif
-
-#include <bits/types.h>
-#include <bits/wordsize.h>
-
-/* Define options for message queue functions.  */
-#define MSG_NOERROR	010000	/* no error if message is too big */
-#ifdef __USE_GNU
-# define MSG_EXCEPT	020000	/* recv any msg except of specified type */
-# define MSG_COPY	040000	/* copy (not remove) all queue messages */
-#endif
-
-/* Types used in the structure definition.  */
-typedef unsigned long int msgqnum_t;
-typedef unsigned long int msglen_t;
-
-
-/* Structure of record for one message inside the kernel.
-   The type `struct msg' is opaque.  */
-struct msqid_ds
-{
-  struct ipc_perm msg_perm;	/* structure describing operation permission */
-#if __WORDSIZE == 32
-  unsigned int __pad1;
-#endif
-  __time_t msg_stime;		/* time of last msgsnd command */
-#if __WORDSIZE == 32
-  unsigned int __pad2;
-#endif
-  __time_t msg_rtime;		/* time of last msgrcv command */
-#if __WORDSIZE == 32
-  unsigned int __pad3;
-#endif
-  __time_t msg_ctime;		/* time of last change */
-  unsigned long int __msg_cbytes; /* current number of bytes on queue */
-  msgqnum_t msg_qnum;		/* number of messages currently on queue */
-  msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
-  __pid_t msg_lspid;		/* pid of last msgsnd() */
-  __pid_t msg_lrpid;		/* pid of last msgrcv() */
-  unsigned long int __glibc_reserved1;
-  unsigned long int __glibc_reserved2;
-};
-
-#ifdef __USE_MISC
-
-# define msg_cbytes	__msg_cbytes
-
-/* ipcs ctl commands */
-# define MSG_STAT 11
-# define MSG_INFO 12
-# define MSG_STAT_ANY 13
-
-/* buffer for msgctl calls IPC_INFO, MSG_INFO */
-struct msginfo
-  {
-    int msgpool;
-    int msgmap;
-    int msgmax;
-    int msgmnb;
-    int msgmni;
-    int msgssz;
-    int msgtql;
-    unsigned short int msgseg;
-  };
-
-#endif /* __USE_MISC */
diff --git a/sysdeps/unix/sysv/linux/x86/bits/msq-pad.h b/sysdeps/unix/sysv/linux/x86/bits/msq-pad.h
new file mode 100644
index 0000000000..5d46956c77
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86/bits/msq-pad.h
@@ -0,0 +1,28 @@
+/* Define where padding goes in struct msqid_ds.  x86 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_MSG_H
+# error "Never use <bits/msq-pad.h> directly; include <sys/msg.h> instead."
+#endif
+
+#ifdef __x86_64__
+# define __MSQ_PAD_AFTER_TIME 0
+#else
+# define __MSQ_PAD_AFTER_TIME 1
+#endif
+#define __MSQ_PAD_BEFORE_TIME 0
diff --git a/sysdeps/unix/sysv/linux/x86/bits/msq.h b/sysdeps/unix/sysv/linux/x86/bits/msq.h
deleted file mode 100644
index bc2e3bd13d..0000000000
--- a/sysdeps/unix/sysv/linux/x86/bits/msq.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_MSG_H
-# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
-#endif
-
-#include <bits/types.h>
-
-/* Define options for message queue functions.  */
-#define MSG_NOERROR	010000	/* no error if message is too big */
-#ifdef __USE_GNU
-# define MSG_EXCEPT	020000	/* recv any msg except of specified type */
-# define MSG_COPY	040000	/* copy (not remove) all queue messages */
-#endif
-
-/* Types used in the structure definition.  */
-typedef __syscall_ulong_t msgqnum_t;
-typedef __syscall_ulong_t msglen_t;
-
-/* Structure of record for one message inside the kernel.
-   The type `struct msg' is opaque.  */
-struct msqid_ds
-{
-  struct ipc_perm msg_perm;	/* structure describing operation permission */
-  __time_t msg_stime;		/* time of last msgsnd command */
-#ifndef __x86_64__
-  unsigned long int __glibc_reserved1;
-#endif
-  __time_t msg_rtime;		/* time of last msgrcv command */
-#ifndef __x86_64__
-  unsigned long int __glibc_reserved2;
-#endif
-  __time_t msg_ctime;		/* time of last change */
-#ifndef __x86_64__
-  unsigned long int __glibc_reserved3;
-#endif
-  __syscall_ulong_t __msg_cbytes; /* current number of bytes on queue */
-  msgqnum_t msg_qnum;		/* number of messages currently on queue */
-  msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
-  __pid_t msg_lspid;		/* pid of last msgsnd() */
-  __pid_t msg_lrpid;		/* pid of last msgrcv() */
-  __syscall_ulong_t __glibc_reserved4;
-  __syscall_ulong_t __glibc_reserved5;
-};
-
-#ifdef __USE_MISC
-
-# define msg_cbytes	__msg_cbytes
-
-/* ipcs ctl commands */
-# define MSG_STAT 11
-# define MSG_INFO 12
-# define MSG_STAT_ANY 13
-
-/* buffer for msgctl calls IPC_INFO, MSG_INFO */
-struct msginfo
-  {
-    int msgpool;
-    int msgmap;
-    int msgmax;
-    int msgmnb;
-    int msgmni;
-    int msgssz;
-    int msgtql;
-    unsigned short int msgseg;
-  };
-
-#endif /* __USE_MISC */
