[V3,03/17] asm-generic: compat: Cleanup duplicate definitions

Commit Message

Guo Ren Jan. 20, 2022, 7:38 a.m. UTC

From: Guo Ren <[e-mail]>

There are 7 64bit architectures that support Linux COMPAT mode to
run 32bit applications. A lot of definitions are duplicate:
 - COMPAT_USER_HZ
 - COMPAT_RLIM_INFINITY
 - COMPAT_OFF_T_MAX
 - __compat_uid_t, __compat_uid_t
 - compat_dev_t
 - compat_ipc_pid_t
 - struct compat_flock
 - struct compat_flock64
 - struct compat_statfs
 - struct compat_ipc64_perm, compat_semid64_ds,
	  compat_msqid64_ds, compat_shmid64_ds

Cleanup duplicate definitions and merge them into asm-generic.

Signed-off-by: Guo Ren <[e-mail]>
Signed-off-by: Guo Ren <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
---
 arch/arm64/include/asm/compat.h   | 108 +++-----------------------
 arch/mips/include/asm/compat.h    |  24 ++----
 arch/parisc/include/asm/compat.h  |  47 ++----------
 arch/powerpc/include/asm/compat.h |  47 ++----------
 arch/s390/include/asm/compat.h    | 109 +++-----------------------
 arch/sparc/include/asm/compat.h   |  39 ++++------
 arch/x86/include/asm/compat.h     | 114 +++-------------------------
 include/asm-generic/compat.h      | 122 ++++++++++++++++++++++++++++++
 8 files changed, 191 insertions(+), 419 deletions(-)

Comments

Arnd Bergmann Jan. 20, 2022, 11:52 a.m. UTC | #1

On Thu, Jan 20, 2022 at 8:38 AM <[e-mail]> wrote:
>
> From: Guo Ren <[e-mail]>
>
> There are 7 64bit architectures that support Linux COMPAT mode to
> run 32bit applications. A lot of definitions are duplicate:
>  - COMPAT_USER_HZ
>  - COMPAT_RLIM_INFINITY
>  - COMPAT_OFF_T_MAX
>  - __compat_uid_t, __compat_uid_t
>  - compat_dev_t
>  - compat_ipc_pid_t
>  - struct compat_flock
>  - struct compat_flock64
>  - struct compat_statfs
>  - struct compat_ipc64_perm, compat_semid64_ds,
>           compat_msqid64_ds, compat_shmid64_ds
>
> Cleanup duplicate definitions and merge them into asm-generic.
>
> Signed-off-by: Guo Ren <[e-mail]>
> Signed-off-by: Guo Ren <[e-mail]>
> Cc: Arnd Bergmann <[e-mail]>

> ---
>  arch/arm64/include/asm/compat.h   | 108 +++-----------------------
>  arch/mips/include/asm/compat.h    |  24 ++----
>  arch/parisc/include/asm/compat.h  |  47 ++----------
>  arch/powerpc/include/asm/compat.h |  47 ++----------
>  arch/s390/include/asm/compat.h    | 109 +++-----------------------
>  arch/sparc/include/asm/compat.h   |  39 ++++------
>  arch/x86/include/asm/compat.h     | 114 +++-------------------------
>  include/asm-generic/compat.h      | 122 ++++++++++++++++++++++++++++++
>  8 files changed, 191 insertions(+), 419 deletions(-)
>
> diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
> index eaa6ca062d89..f54f295efae3 100644
> --- a/arch/arm64/include/asm/compat.h
> +++ b/arch/arm64/include/asm/compat.h
> @@ -5,9 +5,18 @@
>  #ifndef __ASM_COMPAT_H
>  #define __ASM_COMPAT_H
>
> +#define COMPAT_RLIM_INFINITY           0xffffffff
...
> +#ifndef COMPAT_RLIM_INFINITY
> +#define COMPAT_RLIM_INFINITY   0x7fffffff
> +#endif

While this is a correct conversion, I think the default should
be 0xffffffff, to match the asm-generic RLIM_INFINITY
definition, with only mips and sparc getting the exception

> -struct compat_flock {
> -       short           l_type;
> -       short           l_whence;
> -       compat_off_t    l_start;
> -       compat_off_t    l_len;
> -       compat_pid_t    l_pid;
> -};
...
> +#ifndef compat_flock
> +struct compat_flock {
> +       compat_short_t  l_type;
> +       compat_short_t  l_whence;
> +       compat_off_t    l_start;
> +       compat_off_t    l_len;
> +       compat_pid_t    l_pid;
> +} __attribute__((packed));
> +#endif

You are adding __attribute__((packed)) here, which I think has
no effect on the layout on the structure on any of the architectures
but it does change the alignment requirements needlessly.

Better leave it without the attribute.

> -struct compat_flock64 {
> -       short           l_type;
> -       short           l_whence;
> -       compat_loff_t   l_start;
> -       compat_loff_t   l_len;
> -       compat_pid_t    l_pid;
> -};
...
> +#ifndef compat_flock64
> +struct compat_flock64 {
> +       compat_short_t  l_type;
> +       compat_short_t  l_whence;
> +       compat_loff_t   l_start;
> +       compat_loff_t   l_len;
> +       compat_pid_t    l_pid;
> +} __attribute__((packed));
> +#endif

This one is different: on all architectures other than x86,
the added packed attribute changes the size of the
structure by removing the four padding bytes at the
end. x86 originally added the attribute here to work around
the weirdness of the x86-32 ABI that aligns 64-bit values
on a 4-byte boundary.

The easiest workaround would be to have x86 keep its
custom definition. A slightly nicer version would drop the
attribute on x86 as well but instead change the compat_loff_t
definition to use compat_s64 instead of s64, giving it the
correct alignment.

> -struct compat_statfs {
> -       int             f_type;
> -       int             f_bsize;
> -       int             f_blocks;
> -       int             f_bfree;
> -       int             f_bavail;
> -       int             f_files;
> -       int             f_ffree;
> -       compat_fsid_t   f_fsid;
> -       int             f_namelen;      /* SunOS ignores this field. */
> -       int             f_frsize;
> -       int             f_flags;
> -       int             f_spare[4];
> -};
...
> +#ifndef compat_statfs
> +struct compat_statfs {
> +       compat_uint_t   f_type;
> +       compat_uint_t   f_bsize;
> +       compat_uint_t   f_blocks;
> +       compat_uint_t   f_bfree;
> +       compat_uint_t   f_bavail;
> +       compat_uint_t   f_files;
> +       compat_uint_t   f_ffree;
> +       __kernel_fsid_t f_fsid;
> +       compat_uint_t   f_namelen;
> +       compat_uint_t   f_frsize;
> +       compat_uint_t   f_flags;
> +       compat_uint_t   f_spare[4];
> +} __attribute__((packed));
> +#endif

None of the architectures use the packed attribute at the moment,
so please don't add one here.

Changing compat_fsid_t to __kernel_fsid_t is harmless, but seems
unnecessary.

Changing the signed int to an unsigned int (regardless of notation)
may be a change in behavior. s390 is the only architecture
using unsigned members here at the moment, as of b8668fd0a7e1
("s390/uapi: change struct statfs[64] member types to unsigned
values").
The description of that patch sounds like this was changed to fix
a bug, but I don't see what the actual problem would be in the
put_compat_statfs().

For the moment I'd suggest leaving this with the signed version,
with s390 being another exception next to mips. We can follow-up
with merging s390 into the common definition using either the
signed or unsigned types, but I think that needs to be a separate
patch with a detailed explanation.

 +#ifndef compat_ipc64_perm
> +struct compat_ipc64_perm {
> +       compat_key_t key;
> +       __compat_uid32_t uid;
> +       __compat_gid32_t gid;
> +       __compat_uid32_t cuid;
> +       __compat_gid32_t cgid;
> +       compat_mode_t   mode;
> +       unsigned char   __pad1[4 - sizeof(compat_mode_t)];
> +       compat_ushort_t seq;
> +       compat_ushort_t __pad2;
> +       compat_ulong_t  unused1;
> +       compat_ulong_t  unused2;
> +} __attribute__((packed));
> +
> +struct compat_semid64_ds {
> +       struct compat_ipc64_perm sem_perm;
> +       compat_ulong_t sem_otime;
> +       compat_ulong_t sem_otime_high;
> +       compat_ulong_t sem_ctime;
> +       compat_ulong_t sem_ctime_high;
> +       compat_ulong_t sem_nsems;
> +       compat_ulong_t __unused3;
> +       compat_ulong_t __unused4;
> +} __attribute__((packed));
> +
> +struct compat_msqid64_ds {
> +       struct compat_ipc64_perm msg_perm;
> +       compat_ulong_t msg_stime;
> +       compat_ulong_t msg_stime_high;
> +       compat_ulong_t msg_rtime;
> +       compat_ulong_t msg_rtime_high;
> +       compat_ulong_t msg_ctime;
> +       compat_ulong_t msg_ctime_high;
> +       compat_ulong_t msg_cbytes;
> +       compat_ulong_t msg_qnum;
> +       compat_ulong_t msg_qbytes;
> +       compat_pid_t   msg_lspid;
> +       compat_pid_t   msg_lrpid;
> +       compat_ulong_t __unused4;
> +       compat_ulong_t __unused5;
> +} __attribute__((packed));
> +
> +struct compat_shmid64_ds {
> +       struct compat_ipc64_perm shm_perm;
> +       compat_size_t  shm_segsz;
> +       compat_ulong_t shm_atime;
> +       compat_ulong_t shm_atime_high;
> +       compat_ulong_t shm_dtime;
> +       compat_ulong_t shm_dtime_high;
> +       compat_ulong_t shm_ctime;
> +       compat_ulong_t shm_ctime_high;
> +       compat_pid_t   shm_cpid;
> +       compat_pid_t   shm_lpid;
> +       compat_ulong_t shm_nattch;
> +       compat_ulong_t __unused4;
> +       compat_ulong_t __unused5;
> +} __attribute__((packed));
> +#endif

I checked these in detail, looking at the seven architectures, and your
conversion looks exactly right (I had initially missed the part about
compat_mode_t that you got right).

As with compat_flock, the packed attribute has no impact on the layout
here, but please drop it anyway for consistency.

        Arnd

David Laight Jan. 20, 2022, 1:02 p.m. UTC | #2

From: Arnd Bergmann
> Sent: 20 January 2022 11:52
..
> As with compat_flock, the packed attribute has no impact on the layout
> here, but please drop it anyway for consistency.

Never mind the structure layout, because 'packed' allows the
structure to be aligned on any boundary it forces the compiler
to use byte memory accesses and shifts on some architectures.
This is a horrid performance penalty.

'packed' should only be specified for structures that can
occur on any address boundary.
ie basically never.

If you need to remove the implicit pad before a field (eg 64bit
fields on x64-32) then you can mark the field itself as 'packed'.
Although, in that case, putting the attribute on the type (compat_s64)
is generally cleaner.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)

Guo Ren Jan. 28, 2022, 7:20 a.m. UTC | #3

On Thu, Jan 20, 2022 at 9:02 PM Arnd Bergmann <[e-mail]> wrote:
>
>   On Thu, Jan 20, 2022 at 8:38 AM <[e-mail]> wrote:
> >
> > From: Guo Ren <[e-mail]>
> >
> > There are 7 64bit architectures that support Linux COMPAT mode to
> > run 32bit applications. A lot of definitions are duplicate:
> >  - COMPAT_USER_HZ
> >  - COMPAT_RLIM_INFINITY
> >  - COMPAT_OFF_T_MAX
> >  - __compat_uid_t, __compat_uid_t
> >  - compat_dev_t
> >  - compat_ipc_pid_t
> >  - struct compat_flock
> >  - struct compat_flock64
> >  - struct compat_statfs
> >  - struct compat_ipc64_perm, compat_semid64_ds,
> >           compat_msqid64_ds, compat_shmid64_ds
> >
> > Cleanup duplicate definitions and merge them into asm-generic.
> >
> > Signed-off-by: Guo Ren <[e-mail]>
> > Signed-off-by: Guo Ren <[e-mail]>
> > Cc: Arnd Bergmann <[e-mail]>
>
> > ---
> >  arch/arm64/include/asm/compat.h   | 108 +++-----------------------
> >  arch/mips/include/asm/compat.h    |  24 ++----
> >  arch/parisc/include/asm/compat.h  |  47 ++----------
> >  arch/powerpc/include/asm/compat.h |  47 ++----------
> >  arch/s390/include/asm/compat.h    | 109 +++-----------------------
> >  arch/sparc/include/asm/compat.h   |  39 ++++------
> >  arch/x86/include/asm/compat.h     | 114 +++-------------------------
> >  include/asm-generic/compat.h      | 122 ++++++++++++++++++++++++++++++
> >  8 files changed, 191 insertions(+), 419 deletions(-)
> >
> > diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
> > index eaa6ca062d89..f54f295efae3 100644
> > --- a/arch/arm64/include/asm/compat.h
> > +++ b/arch/arm64/include/asm/compat.h
> > @@ -5,9 +5,18 @@
> >  #ifndef __ASM_COMPAT_H
> >  #define __ASM_COMPAT_H
> >
> > +#define COMPAT_RLIM_INFINITY           0xffffffff
> ...
> > +#ifndef COMPAT_RLIM_INFINITY
> > +#define COMPAT_RLIM_INFINITY   0x7fffffff
> > +#endif
>
> While this is a correct conversion, I think the default should
> be 0xffffffff, to match the asm-generic RLIM_INFINITY
> definition, with only mips and sparc getting the exception
Okay

>
> > -struct compat_flock {
> > -       short           l_type;
> > -       short           l_whence;
> > -       compat_off_t    l_start;
> > -       compat_off_t    l_len;
> > -       compat_pid_t    l_pid;
> > -};
> ...
> > +#ifndef compat_flock
> > +struct compat_flock {
> > +       compat_short_t  l_type;
> > +       compat_short_t  l_whence;
> > +       compat_off_t    l_start;
> > +       compat_off_t    l_len;
> > +       compat_pid_t    l_pid;
> > +} __attribute__((packed));
> > +#endif
>
> You are adding __attribute__((packed)) here, which I think has
> no effect on the layout on the structure on any of the architectures
> but it does change the alignment requirements needlessly.
>
> Better leave it without the attribute.
Okay

>
> > -struct compat_flock64 {
> > -       short           l_type;
> > -       short           l_whence;
> > -       compat_loff_t   l_start;
> > -       compat_loff_t   l_len;
> > -       compat_pid_t    l_pid;
> > -};
> ...
> > +#ifndef compat_flock64
> > +struct compat_flock64 {
> > +       compat_short_t  l_type;
> > +       compat_short_t  l_whence;
> > +       compat_loff_t   l_start;
> > +       compat_loff_t   l_len;
> > +       compat_pid_t    l_pid;
> > +} __attribute__((packed));
> > +#endif
>
> This one is different: on all architectures other than x86,
> the added packed attribute changes the size of the
> structure by removing the four padding bytes at the
> end. x86 originally added the attribute here to work around
> the weirdness of the x86-32 ABI that aligns 64-bit values
> on a 4-byte boundary.
>
> The easiest workaround would be to have x86 keep its
> custom definition. A slightly nicer version would drop the
> attribute on x86 as well but instead change the compat_loff_t
> definition to use compat_s64 instead of s64, giving it the
> correct alignment.
Okay, I would leave x86 origin first.

>
> > -struct compat_statfs {
> > -       int             f_type;
> > -       int             f_bsize;
> > -       int             f_blocks;
> > -       int             f_bfree;
> > -       int             f_bavail;
> > -       int             f_files;
> > -       int             f_ffree;
> > -       compat_fsid_t   f_fsid;
> > -       int             f_namelen;      /* SunOS ignores this field. */
> > -       int             f_frsize;
> > -       int             f_flags;
> > -       int             f_spare[4];
> > -};
> ...
> > +#ifndef compat_statfs
> > +struct compat_statfs {
> > +       compat_uint_t   f_type;
> > +       compat_uint_t   f_bsize;
> > +       compat_uint_t   f_blocks;
> > +       compat_uint_t   f_bfree;
> > +       compat_uint_t   f_bavail;
> > +       compat_uint_t   f_files;
> > +       compat_uint_t   f_ffree;
> > +       __kernel_fsid_t f_fsid;
> > +       compat_uint_t   f_namelen;
> > +       compat_uint_t   f_frsize;
> > +       compat_uint_t   f_flags;
> > +       compat_uint_t   f_spare[4];
> > +} __attribute__((packed));
> > +#endif
>
> None of the architectures use the packed attribute at the moment,
> so please don't add one here.
>
> Changing compat_fsid_t to __kernel_fsid_t is harmless, but seems
> unnecessary.
Okay. I would add another
typedef __kernel_fsid_t compat_fsid_t;
in the file.

>
> Changing the signed int to an unsigned int (regardless of notation)
> may be a change in behavior. s390 is the only architecture
> using unsigned members here at the moment, as of b8668fd0a7e1
> ("s390/uapi: change struct statfs[64] member types to unsigned
> values").
> The description of that patch sounds like this was changed to fix
> a bug, but I don't see what the actual problem would be in the
> put_compat_statfs().
>
> For the moment I'd suggest leaving this with the signed version,
> with s390 being another exception next to mips. We can follow-up
> with merging s390 into the common definition using either the
> signed or unsigned types, but I think that needs to be a separate
> patch with a detailed explanation.
Okay, I would leave s390 origin first.

>
>  +#ifndef compat_ipc64_perm
> > +struct compat_ipc64_perm {
> > +       compat_key_t key;
> > +       __compat_uid32_t uid;
> > +       __compat_gid32_t gid;
> > +       __compat_uid32_t cuid;
> > +       __compat_gid32_t cgid;
> > +       compat_mode_t   mode;
> > +       unsigned char   __pad1[4 - sizeof(compat_mode_t)];
> > +       compat_ushort_t seq;
> > +       compat_ushort_t __pad2;
> > +       compat_ulong_t  unused1;
> > +       compat_ulong_t  unused2;
> > +} __attribute__((packed));
> > +
> > +struct compat_semid64_ds {
> > +       struct compat_ipc64_perm sem_perm;
> > +       compat_ulong_t sem_otime;
> > +       compat_ulong_t sem_otime_high;
> > +       compat_ulong_t sem_ctime;
> > +       compat_ulong_t sem_ctime_high;
> > +       compat_ulong_t sem_nsems;
> > +       compat_ulong_t __unused3;
> > +       compat_ulong_t __unused4;
> > +} __attribute__((packed));
> > +
> > +struct compat_msqid64_ds {
> > +       struct compat_ipc64_perm msg_perm;
> > +       compat_ulong_t msg_stime;
> > +       compat_ulong_t msg_stime_high;
> > +       compat_ulong_t msg_rtime;
> > +       compat_ulong_t msg_rtime_high;
> > +       compat_ulong_t msg_ctime;
> > +       compat_ulong_t msg_ctime_high;
> > +       compat_ulong_t msg_cbytes;
> > +       compat_ulong_t msg_qnum;
> > +       compat_ulong_t msg_qbytes;
> > +       compat_pid_t   msg_lspid;
> > +       compat_pid_t   msg_lrpid;
> > +       compat_ulong_t __unused4;
> > +       compat_ulong_t __unused5;
> > +} __attribute__((packed));
> > +
> > +struct compat_shmid64_ds {
> > +       struct compat_ipc64_perm shm_perm;
> > +       compat_size_t  shm_segsz;
> > +       compat_ulong_t shm_atime;
> > +       compat_ulong_t shm_atime_high;
> > +       compat_ulong_t shm_dtime;
> > +       compat_ulong_t shm_dtime_high;
> > +       compat_ulong_t shm_ctime;
> > +       compat_ulong_t shm_ctime_high;
> > +       compat_pid_t   shm_cpid;
> > +       compat_pid_t   shm_lpid;
> > +       compat_ulong_t shm_nattch;
> > +       compat_ulong_t __unused4;
> > +       compat_ulong_t __unused5;
> > +} __attribute__((packed));
> > +#endif
>
> I checked these in detail, looking at the seven architectures, and your
> conversion looks exactly right (I had initially missed the part about
> compat_mode_t that you got right).
>
> As with compat_flock, the packed attribute has no impact on the layout
> here, but please drop it anyway for consistency.
>
>         Arnd

Patch

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index eaa6ca062d89..f54f295efae3 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -5,9 +5,18 @@ 
 #ifndef __ASM_COMPAT_H
 #define __ASM_COMPAT_H
 
+#define COMPAT_RLIM_INFINITY		0xffffffff
+
 #define compat_mode_t compat_mode_t
 typedef u16		compat_mode_t;
 
+#define __compat_uid_t	__compat_uid_t
+typedef u16		__compat_uid_t;
+typedef u16		__compat_gid_t;
+
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16		 compat_ipc_pid_t;
+
 #include <asm-generic/compat.h>
 
 #ifdef CONFIG_COMPAT
@@ -19,21 +28,15 @@  typedef u16		compat_mode_t;
 #include <linux/sched.h>
 #include <linux/sched/task_stack.h>
 
-#define COMPAT_USER_HZ		100
 #ifdef __AARCH64EB__
 #define COMPAT_UTS_MACHINE	"armv8b\0\0"
 #else
 #define COMPAT_UTS_MACHINE	"armv8l\0\0"
 #endif
 
-typedef u16		__compat_uid_t;
-typedef u16		__compat_gid_t;
 typedef u16		__compat_uid16_t;
 typedef u16		__compat_gid16_t;
-typedef u32		compat_dev_t;
 typedef s32		compat_nlink_t;
-typedef u16		compat_ipc_pid_t;
-typedef __kernel_fsid_t	compat_fsid_t;
 
 struct compat_stat {
 #ifdef __AARCH64EB__
@@ -65,106 +68,13 @@  struct compat_stat {
 	compat_ulong_t	__unused4[2];
 };
 
-struct compat_flock {
-	short		l_type;
-	short		l_whence;
-	compat_off_t	l_start;
-	compat_off_t	l_len;
-	compat_pid_t	l_pid;
-};
-
 #define F_GETLK64	12	/*  using 'struct flock64' */
 #define F_SETLK64	13
 #define F_SETLKW64	14
 
-struct compat_flock64 {
-	short		l_type;
-	short		l_whence;
-	compat_loff_t	l_start;
-	compat_loff_t	l_len;
-	compat_pid_t	l_pid;
-};
-
-struct compat_statfs {
-	int		f_type;
-	int		f_bsize;
-	int		f_blocks;
-	int		f_bfree;
-	int		f_bavail;
-	int		f_files;
-	int		f_ffree;
-	compat_fsid_t	f_fsid;
-	int		f_namelen;	/* SunOS ignores this field. */
-	int		f_frsize;
-	int		f_flags;
-	int		f_spare[4];
-};
-
-#define COMPAT_RLIM_INFINITY		0xffffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
 #define COMPAT_MINSIGSTKSZ	2048
 
-struct compat_ipc64_perm {
-	compat_key_t key;
-	__compat_uid32_t uid;
-	__compat_gid32_t gid;
-	__compat_uid32_t cuid;
-	__compat_gid32_t cgid;
-	unsigned short mode;
-	unsigned short __pad1;
-	unsigned short seq;
-	unsigned short __pad2;
-	compat_ulong_t unused1;
-	compat_ulong_t unused2;
-};
-
-struct compat_semid64_ds {
-	struct compat_ipc64_perm sem_perm;
-	compat_ulong_t sem_otime;
-	compat_ulong_t sem_otime_high;
-	compat_ulong_t sem_ctime;
-	compat_ulong_t sem_ctime_high;
-	compat_ulong_t sem_nsems;
-	compat_ulong_t __unused3;
-	compat_ulong_t __unused4;
-};
-
-struct compat_msqid64_ds {
-	struct compat_ipc64_perm msg_perm;
-	compat_ulong_t msg_stime;
-	compat_ulong_t msg_stime_high;
-	compat_ulong_t msg_rtime;
-	compat_ulong_t msg_rtime_high;
-	compat_ulong_t msg_ctime;
-	compat_ulong_t msg_ctime_high;
-	compat_ulong_t msg_cbytes;
-	compat_ulong_t msg_qnum;
-	compat_ulong_t msg_qbytes;
-	compat_pid_t   msg_lspid;
-	compat_pid_t   msg_lrpid;
-	compat_ulong_t __unused4;
-	compat_ulong_t __unused5;
-};
-
-struct compat_shmid64_ds {
-	struct compat_ipc64_perm shm_perm;
-	compat_size_t  shm_segsz;
-	compat_ulong_t shm_atime;
-	compat_ulong_t shm_atime_high;
-	compat_ulong_t shm_dtime;
-	compat_ulong_t shm_dtime_high;
-	compat_ulong_t shm_ctime;
-	compat_ulong_t shm_ctime_high;
-	compat_pid_t   shm_cpid;
-	compat_pid_t   shm_lpid;
-	compat_ulong_t shm_nattch;
-	compat_ulong_t __unused4;
-	compat_ulong_t __unused5;
-};
-
 static inline int is_compat_task(void)
 {
 	return test_thread_flag(TIF_32BIT);
diff --git a/arch/mips/include/asm/compat.h b/arch/mips/include/asm/compat.h
index bbb3bc5a42fd..cc2d76953792 100644
--- a/arch/mips/include/asm/compat.h
+++ b/arch/mips/include/asm/compat.h
@@ -9,12 +9,17 @@ 
 #include <asm/page.h>
 #include <asm/ptrace.h>
 
+#define __compat_uid_t	__compat_uid_t
 typedef s32		__compat_uid_t;
 typedef s32		__compat_gid_t;
+
+#define __compat_uid32_t __compat_uid32_t
 typedef __compat_uid_t	__compat_uid32_t;
 typedef __compat_gid_t	__compat_gid32_t;
-#define __compat_uid32_t __compat_uid32_t
-#define __compat_gid32_t __compat_gid32_t
+
+#define compat_flock		compat_flock
+#define compat_statfs		compat_statfs
+#define compat_ipc64_perm	compat_ipc64_perm
 
 #define _COMPAT_NSIG		128		/* Don't ask !$@#% ...	*/
 #define _COMPAT_NSIG_BPW	32
@@ -22,12 +27,9 @@  typedef u32		compat_sigset_word;
 
 #include <asm-generic/compat.h>
 
-#define COMPAT_USER_HZ		100
 #define COMPAT_UTS_MACHINE	"mips\0\0\0"
 
-typedef u32		compat_dev_t;
 typedef u32		compat_nlink_t;
-typedef s32		compat_ipc_pid_t;
 typedef struct {
 	s32	val[2];
 } compat_fsid_t;
@@ -69,14 +71,6 @@  struct compat_flock {
 #define F_SETLK64	34
 #define F_SETLKW64	35
 
-struct compat_flock64 {
-	short		l_type;
-	short		l_whence;
-	compat_loff_t	l_start;
-	compat_loff_t	l_len;
-	compat_pid_t	l_pid;
-};
-
 struct compat_statfs {
 	int		f_type;
 	int		f_bsize;
@@ -92,10 +86,6 @@  struct compat_statfs {
 	int		f_spare[5];
 };
 
-#define COMPAT_RLIM_INFINITY	0x7fffffffUL
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 struct compat_ipc64_perm {
 	compat_key_t key;
 	__compat_uid32_t uid;
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index c04f5a637c39..113476345c76 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -8,19 +8,21 @@ 
 #include <linux/sched.h>
 #include <linux/thread_info.h>
 
+#define COMPAT_RLIM_INFINITY	0xffffffff
+
 #define compat_mode_t compat_mode_t
 typedef u16	compat_mode_t;
 
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16	compat_ipc_pid_t;
+
+#define compat_ipc64_perm compat_ipc64_perm
+
 #include <asm-generic/compat.h>
 
-#define COMPAT_USER_HZ 		100
 #define COMPAT_UTS_MACHINE	"parisc\0\0"
 
-typedef u32	__compat_uid_t;
-typedef u32	__compat_gid_t;
-typedef u32	compat_dev_t;
 typedef u16	compat_nlink_t;
-typedef u16	compat_ipc_pid_t;
 
 struct compat_stat {
 	compat_dev_t		st_dev;	/* dev_t is 32 bits on parisc */
@@ -53,37 +55,6 @@  struct compat_stat {
 	u32			st_spare4[3];
 };
 
-struct compat_flock {
-	short			l_type;
-	short			l_whence;
-	compat_off_t		l_start;
-	compat_off_t		l_len;
-	compat_pid_t		l_pid;
-};
-
-struct compat_flock64 {
-	short			l_type;
-	short			l_whence;
-	compat_loff_t		l_start;
-	compat_loff_t		l_len;
-	compat_pid_t		l_pid;
-};
-
-struct compat_statfs {
-	s32		f_type;
-	s32		f_bsize;
-	s32		f_blocks;
-	s32		f_bfree;
-	s32		f_bavail;
-	s32		f_files;
-	s32		f_ffree;
-	__kernel_fsid_t	f_fsid;
-	s32		f_namelen;
-	s32		f_frsize;
-	s32		f_flags;
-	s32		f_spare[4];
-};
-
 struct compat_sigcontext {
 	compat_int_t sc_flags;
 	compat_int_t sc_gr[32]; /* PSW in sc_gr[0] */
@@ -93,10 +64,6 @@  struct compat_sigcontext {
 	compat_int_t sc_sar; /* cr11 */
 };
 
-#define COMPAT_RLIM_INFINITY 0xffffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 struct compat_ipc64_perm {
 	compat_key_t key;
 	__compat_uid_t uid;
diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index 7afc96fb6524..6369c6debc9c 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -8,20 +8,22 @@ 
 #include <linux/types.h>
 #include <linux/sched.h>
 
+#define COMPAT_RLIM_INFINITY		0xffffffff
+
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16		compat_ipc_pid_t;
+
+#define compat_ipc64_perm compat_ipc64_perm
+
 #include <asm-generic/compat.h>
 
-#define COMPAT_USER_HZ		100
 #ifdef __BIG_ENDIAN__
 #define COMPAT_UTS_MACHINE	"ppc\0\0"
 #else
 #define COMPAT_UTS_MACHINE	"ppcle\0\0"
 #endif
 
-typedef u32		__compat_uid_t;
-typedef u32		__compat_gid_t;
-typedef u32		compat_dev_t;
 typedef s16		compat_nlink_t;
-typedef u16		compat_ipc_pid_t;
 typedef __kernel_fsid_t	compat_fsid_t;
 
 struct compat_stat {
@@ -44,45 +46,10 @@  struct compat_stat {
 	u32		__unused4[2];
 };
 
-struct compat_flock {
-	short		l_type;
-	short		l_whence;
-	compat_off_t	l_start;
-	compat_off_t	l_len;
-	compat_pid_t	l_pid;
-};
-
 #define F_GETLK64	12	/*  using 'struct flock64' */
 #define F_SETLK64	13
 #define F_SETLKW64	14
 
-struct compat_flock64 {
-	short		l_type;
-	short		l_whence;
-	compat_loff_t	l_start;
-	compat_loff_t	l_len;
-	compat_pid_t	l_pid;
-};
-
-struct compat_statfs {
-	int		f_type;
-	int		f_bsize;
-	int		f_blocks;
-	int		f_bfree;
-	int		f_bavail;
-	int		f_files;
-	int		f_ffree;
-	compat_fsid_t	f_fsid;
-	int		f_namelen;	/* SunOS ignores this field. */
-	int		f_frsize;
-	int		f_flags;
-	int		f_spare[4];
-};
-
-#define COMPAT_RLIM_INFINITY		0xffffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 /*
  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
  * it we may as well define it.
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index cdc7ae72529d..442829e03c76 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -9,9 +9,21 @@ 
 #include <linux/sched/task_stack.h>
 #include <linux/thread_info.h>
 
+#define COMPAT_RLIM_INFINITY	0xffffffff
+
 #define compat_mode_t	compat_mode_t
 typedef u16		compat_mode_t;
 
+#define __compat_uid_t	__compat_uid_t
+typedef u16		__compat_uid_t;
+typedef u16		__compat_gid_t;
+
+#define compat_dev_t	compat_dev_t
+typedef u16		compat_dev_t;
+
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16		 compat_ipc_pid_t;
+
 #include <asm-generic/compat.h>
 
 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
@@ -53,14 +65,9 @@  typedef u16		compat_mode_t;
 			 PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
 			 PSW32_ASC_PRIMARY)
 
-#define COMPAT_USER_HZ		100
 #define COMPAT_UTS_MACHINE	"s390\0\0\0\0"
 
-typedef u16		__compat_uid_t;
-typedef u16		__compat_gid_t;
-typedef u16		compat_dev_t;
 typedef u16		compat_nlink_t;
-typedef u16		compat_ipc_pid_t;
 typedef __kernel_fsid_t	compat_fsid_t;
 
 typedef struct {
@@ -102,41 +109,10 @@  struct compat_stat {
 	u32		__unused5;
 };
 
-struct compat_flock {
-	short		l_type;
-	short		l_whence;
-	compat_off_t	l_start;
-	compat_off_t	l_len;
-	compat_pid_t	l_pid;
-};
-
 #define F_GETLK64       12
 #define F_SETLK64       13
 #define F_SETLKW64      14    
 
-struct compat_flock64 {
-	short		l_type;
-	short		l_whence;
-	compat_loff_t	l_start;
-	compat_loff_t	l_len;
-	compat_pid_t	l_pid;
-};
-
-struct compat_statfs {
-	u32		f_type;
-	u32		f_bsize;
-	u32		f_blocks;
-	u32		f_bfree;
-	u32		f_bavail;
-	u32		f_files;
-	u32		f_ffree;
-	compat_fsid_t	f_fsid;
-	u32		f_namelen;
-	u32		f_frsize;
-	u32		f_flags;
-	u32		f_spare[4];
-};
-
 struct compat_statfs64 {
 	u32		f_type;
 	u32		f_bsize;
@@ -152,10 +128,6 @@  struct compat_statfs64 {
 	u32		f_spare[4];
 };
 
-#define COMPAT_RLIM_INFINITY		0xffffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 /*
  * A pointer passed in from user mode. This should not
  * be used for syscall parameters, just declare them
@@ -178,61 +150,4 @@  static inline int is_compat_task(void)
 
 #endif
 
-struct compat_ipc64_perm {
-	compat_key_t key;
-	__compat_uid32_t uid;
-	__compat_gid32_t gid;
-	__compat_uid32_t cuid;
-	__compat_gid32_t cgid;
-	compat_mode_t mode;
-	unsigned short __pad1;
-	unsigned short seq;
-	unsigned short __pad2;
-	unsigned int __unused1;
-	unsigned int __unused2;
-};
-
-struct compat_semid64_ds {
-	struct compat_ipc64_perm sem_perm;
-	compat_ulong_t sem_otime;
-	compat_ulong_t sem_otime_high;
-	compat_ulong_t sem_ctime;
-	compat_ulong_t sem_ctime_high;
-	compat_ulong_t sem_nsems;
-	compat_ulong_t __unused1;
-	compat_ulong_t __unused2;
-};
-
-struct compat_msqid64_ds {
-	struct compat_ipc64_perm msg_perm;
-	compat_ulong_t msg_stime;
-	compat_ulong_t msg_stime_high;
-	compat_ulong_t msg_rtime;
-	compat_ulong_t msg_rtime_high;
-	compat_ulong_t msg_ctime;
-	compat_ulong_t msg_ctime_high;
-	compat_ulong_t msg_cbytes;
-	compat_ulong_t msg_qnum;
-	compat_ulong_t msg_qbytes;
-	compat_pid_t   msg_lspid;
-	compat_pid_t   msg_lrpid;
-	compat_ulong_t __unused1;
-	compat_ulong_t __unused2;
-};
-
-struct compat_shmid64_ds {
-	struct compat_ipc64_perm shm_perm;
-	compat_size_t  shm_segsz;
-	compat_ulong_t shm_atime;
-	compat_ulong_t shm_atime_high;
-	compat_ulong_t shm_dtime;
-	compat_ulong_t shm_dtime_high;
-	compat_ulong_t shm_ctime;
-	compat_ulong_t shm_ctime_high;
-	compat_pid_t   shm_cpid;
-	compat_pid_t   shm_lpid;
-	compat_ulong_t shm_nattch;
-	compat_ulong_t __unused1;
-	compat_ulong_t __unused2;
-};
 #endif /* _ASM_S390X_COMPAT_H */
diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h
index bd949fcf9d63..44c7d1db3c80 100644
--- a/arch/sparc/include/asm/compat.h
+++ b/arch/sparc/include/asm/compat.h
@@ -9,16 +9,26 @@ 
 #define compat_mode_t	compat_mode_t
 typedef u16		compat_mode_t;
 
+#define __compat_uid_t	__compat_uid_t
+typedef u16		__compat_uid_t;
+typedef u16		__compat_gid_t;
+
+#define compat_dev_t	compat_dev_t
+typedef u16		compat_dev_t;
+
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16		 compat_ipc_pid_t;
+
+#define compat_flock	compat_flock
+#define compat_flock64	compat_flock64
+
+#define compat_ipc64_perm compat_ipc64_perm
+
 #include <asm-generic/compat.h>
 
-#define COMPAT_USER_HZ		100
 #define COMPAT_UTS_MACHINE	"sparc\0\0"
 
-typedef u16		__compat_uid_t;
-typedef u16		__compat_gid_t;
-typedef u16		compat_dev_t;
 typedef s16		compat_nlink_t;
-typedef u16		compat_ipc_pid_t;
 typedef __kernel_fsid_t	compat_fsid_t;
 
 struct compat_stat {
@@ -97,25 +107,6 @@  struct compat_flock64 {
 	short		__unused;
 };
 
-struct compat_statfs {
-	int		f_type;
-	int		f_bsize;
-	int		f_blocks;
-	int		f_bfree;
-	int		f_bavail;
-	int		f_files;
-	int		f_ffree;
-	compat_fsid_t	f_fsid;
-	int		f_namelen;	/* SunOS ignores this field. */
-	int		f_frsize;
-	int		f_flags;
-	int		f_spare[4];
-};
-
-#define COMPAT_RLIM_INFINITY 0x7fffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
 struct compat_ipc64_perm {
 	compat_key_t key;
 	__compat_uid32_t uid;
diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h
index 7516e4199b3c..3512a9fbca2b 100644
--- a/arch/x86/include/asm/compat.h
+++ b/arch/x86/include/asm/compat.h
@@ -12,19 +12,26 @@ 
 #include <asm/user32.h>
 #include <asm/unistd.h>
 
+#define COMPAT_RLIM_INFINITY	0xffffffff
+
 #define compat_mode_t	compat_mode_t
 typedef u16		compat_mode_t;
 
+#define __compat_uid_t	__compat_uid_t
+typedef u16		__compat_uid_t;
+typedef u16		__compat_gid_t;
+
+#define compat_dev_t	compat_dev_t
+typedef u16		compat_dev_t;
+
+#define compat_ipc_pid_t compat_ipc_pid_t
+typedef u16		 compat_ipc_pid_t;
+
 #include <asm-generic/compat.h>
 
-#define COMPAT_USER_HZ		100
 #define COMPAT_UTS_MACHINE	"i686\0\0"
 
-typedef u16		__compat_uid_t;
-typedef u16		__compat_gid_t;
-typedef u16		compat_dev_t;
 typedef u16		compat_nlink_t;
-typedef u16		compat_ipc_pid_t;
 typedef __kernel_fsid_t	compat_fsid_t;
 
 struct compat_stat {
@@ -50,107 +57,10 @@  struct compat_stat {
 	u32		__unused5;
 };
 
-struct compat_flock {
-	short		l_type;
-	short		l_whence;
-	compat_off_t	l_start;
-	compat_off_t	l_len;
-	compat_pid_t	l_pid;
-};
-
 #define F_GETLK64	12	/*  using 'struct flock64' */
 #define F_SETLK64	13
 #define F_SETLKW64	14
 
-/*
- * IA32 uses 4 byte alignment for 64 bit quantities,
- * so we need to pack this structure.
- */
-struct compat_flock64 {
-	short		l_type;
-	short		l_whence;
-	compat_loff_t	l_start;
-	compat_loff_t	l_len;
-	compat_pid_t	l_pid;
-} __attribute__((packed));
-
-struct compat_statfs {
-	int		f_type;
-	int		f_bsize;
-	int		f_blocks;
-	int		f_bfree;
-	int		f_bavail;
-	int		f_files;
-	int		f_ffree;
-	compat_fsid_t	f_fsid;
-	int		f_namelen;	/* SunOS ignores this field. */
-	int		f_frsize;
-	int		f_flags;
-	int		f_spare[4];
-};
-
-#define COMPAT_RLIM_INFINITY		0xffffffff
-
-#define COMPAT_OFF_T_MAX	0x7fffffff
-
-struct compat_ipc64_perm {
-	compat_key_t key;
-	__compat_uid32_t uid;
-	__compat_gid32_t gid;
-	__compat_uid32_t cuid;
-	__compat_gid32_t cgid;
-	unsigned short mode;
-	unsigned short __pad1;
-	unsigned short seq;
-	unsigned short __pad2;
-	compat_ulong_t unused1;
-	compat_ulong_t unused2;
-};
-
-struct compat_semid64_ds {
-	struct compat_ipc64_perm sem_perm;
-	compat_ulong_t sem_otime;
-	compat_ulong_t sem_otime_high;
-	compat_ulong_t sem_ctime;
-	compat_ulong_t sem_ctime_high;
-	compat_ulong_t sem_nsems;
-	compat_ulong_t __unused3;
-	compat_ulong_t __unused4;
-};
-
-struct compat_msqid64_ds {
-	struct compat_ipc64_perm msg_perm;
-	compat_ulong_t msg_stime;
-	compat_ulong_t msg_stime_high;
-	compat_ulong_t msg_rtime;
-	compat_ulong_t msg_rtime_high;
-	compat_ulong_t msg_ctime;
-	compat_ulong_t msg_ctime_high;
-	compat_ulong_t msg_cbytes;
-	compat_ulong_t msg_qnum;
-	compat_ulong_t msg_qbytes;
-	compat_pid_t   msg_lspid;
-	compat_pid_t   msg_lrpid;
-	compat_ulong_t __unused4;
-	compat_ulong_t __unused5;
-};
-
-struct compat_shmid64_ds {
-	struct compat_ipc64_perm shm_perm;
-	compat_size_t  shm_segsz;
-	compat_ulong_t shm_atime;
-	compat_ulong_t shm_atime_high;
-	compat_ulong_t shm_dtime;
-	compat_ulong_t shm_dtime_high;
-	compat_ulong_t shm_ctime;
-	compat_ulong_t shm_ctime_high;
-	compat_pid_t   shm_cpid;
-	compat_pid_t   shm_lpid;
-	compat_ulong_t shm_nattch;
-	compat_ulong_t __unused4;
-	compat_ulong_t __unused5;
-};
-
 #ifdef CONFIG_X86_X32_ABI
 #define COMPAT_USE_64BIT_TIME \
 	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h
index d46c0201cc34..5d4cb53e4dfc 100644
--- a/include/asm-generic/compat.h
+++ b/include/asm-generic/compat.h
@@ -2,6 +2,18 @@ 
 #ifndef __ASM_GENERIC_COMPAT_H
 #define __ASM_GENERIC_COMPAT_H
 
+#ifndef COMPAT_USER_HZ
+#define COMPAT_USER_HZ		100
+#endif
+
+#ifndef COMPAT_RLIM_INFINITY
+#define COMPAT_RLIM_INFINITY	0x7fffffff
+#endif
+
+#ifndef COMPAT_OFF_T_MAX
+#define COMPAT_OFF_T_MAX	0x7fffffff
+#endif
+
 /* These types are common across all compat ABIs */
 typedef u32 compat_size_t;
 typedef s32 compat_ssize_t;
@@ -24,6 +36,11 @@  typedef u32 compat_caddr_t;
 typedef u32 compat_aio_context_t;
 typedef u32 compat_old_sigset_t;
 
+#ifndef __compat_uid_t
+typedef u32 __compat_uid_t;
+typedef u32 __compat_gid_t;
+#endif
+
 #ifndef __compat_uid32_t
 typedef u32 __compat_uid32_t;
 typedef u32 __compat_gid32_t;
@@ -47,4 +64,109 @@  typedef u32 compat_sigset_word;
 #define _COMPAT_NSIG_BPW 32
 #endif
 
+#ifndef compat_dev_t
+typedef u32 compat_dev_t;
+#endif
+
+#ifndef compat_ipc_pid_t
+typedef s32 compat_ipc_pid_t;
+#endif
+
+#ifndef compat_flock
+struct compat_flock {
+	compat_short_t	l_type;
+	compat_short_t	l_whence;
+	compat_off_t	l_start;
+	compat_off_t	l_len;
+	compat_pid_t	l_pid;
+} __attribute__((packed));
+#endif
+
+#ifndef compat_flock64
+struct compat_flock64 {
+	compat_short_t	l_type;
+	compat_short_t	l_whence;
+	compat_loff_t	l_start;
+	compat_loff_t	l_len;
+	compat_pid_t	l_pid;
+} __attribute__((packed));
+#endif
+
+#ifndef compat_statfs
+struct compat_statfs {
+	compat_uint_t	f_type;
+	compat_uint_t	f_bsize;
+	compat_uint_t	f_blocks;
+	compat_uint_t	f_bfree;
+	compat_uint_t	f_bavail;
+	compat_uint_t	f_files;
+	compat_uint_t	f_ffree;
+	__kernel_fsid_t	f_fsid;
+	compat_uint_t	f_namelen;
+	compat_uint_t	f_frsize;
+	compat_uint_t	f_flags;
+	compat_uint_t	f_spare[4];
+} __attribute__((packed));
+#endif
+
+#ifndef compat_ipc64_perm
+struct compat_ipc64_perm {
+	compat_key_t key;
+	__compat_uid32_t uid;
+	__compat_gid32_t gid;
+	__compat_uid32_t cuid;
+	__compat_gid32_t cgid;
+	compat_mode_t	mode;
+	unsigned char	__pad1[4 - sizeof(compat_mode_t)];
+	compat_ushort_t	seq;
+	compat_ushort_t	__pad2;
+	compat_ulong_t	unused1;
+	compat_ulong_t	unused2;
+} __attribute__((packed));
+
+struct compat_semid64_ds {
+	struct compat_ipc64_perm sem_perm;
+	compat_ulong_t sem_otime;
+	compat_ulong_t sem_otime_high;
+	compat_ulong_t sem_ctime;
+	compat_ulong_t sem_ctime_high;
+	compat_ulong_t sem_nsems;
+	compat_ulong_t __unused3;
+	compat_ulong_t __unused4;
+} __attribute__((packed));
+
+struct compat_msqid64_ds {
+	struct compat_ipc64_perm msg_perm;
+	compat_ulong_t msg_stime;
+	compat_ulong_t msg_stime_high;
+	compat_ulong_t msg_rtime;
+	compat_ulong_t msg_rtime_high;
+	compat_ulong_t msg_ctime;
+	compat_ulong_t msg_ctime_high;
+	compat_ulong_t msg_cbytes;
+	compat_ulong_t msg_qnum;
+	compat_ulong_t msg_qbytes;
+	compat_pid_t   msg_lspid;
+	compat_pid_t   msg_lrpid;
+	compat_ulong_t __unused4;
+	compat_ulong_t __unused5;
+} __attribute__((packed));
+
+struct compat_shmid64_ds {
+	struct compat_ipc64_perm shm_perm;
+	compat_size_t  shm_segsz;
+	compat_ulong_t shm_atime;
+	compat_ulong_t shm_atime_high;
+	compat_ulong_t shm_dtime;
+	compat_ulong_t shm_dtime_high;
+	compat_ulong_t shm_ctime;
+	compat_ulong_t shm_ctime_high;
+	compat_pid_t   shm_cpid;
+	compat_pid_t   shm_lpid;
+	compat_ulong_t shm_nattch;
+	compat_ulong_t __unused4;
+	compat_ulong_t __unused5;
+} __attribute__((packed));
+#endif
+
 #endif