[6/7] sysvipc: Remove the linux shm-pad.h file

Message ID 20200630192441.3299710-6-adhemerval.zanella@linaro.org
State New
Headers show
Series
  • [1/7] sysv: linux: Add 64-bit time_t variant for semctl
Related show

Commit Message

H.J. Lu via Libc-alpha June 30, 2020, 7:24 p.m.
Each architecture overrides the struct msqid_ds which its required
kernel ABI one.

Checked on x86_64-linux-gnu and some bases sysvipc tests on hppa,
mips, mipsle, mips64, mips64le, sparc64, sparcv9, powerpc64le,
powerpc64, and powerpc.
---
 sysdeps/unix/sysv/linux/Makefile              |  2 +-
 sysdeps/unix/sysv/linux/bits/shm-pad.h        | 37 --------------
 sysdeps/unix/sysv/linux/bits/shm.h            |  1 -
 .../sysv/linux/bits/types/struct_shmid_ds.h   | 34 +++++--------
 sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h   | 28 -----------
 .../linux/hppa/bits/types/struct_shmid_ds.h   | 46 +++++++++++++++++
 sysdeps/unix/sysv/linux/mips/bits/shm-pad.h   | 26 ----------
 .../linux/mips/bits/types/struct_shmid_ds.h   | 49 +++++++++++++++++++
 .../unix/sysv/linux/powerpc/bits/shm-pad.h    | 28 -----------
 .../powerpc/bits/types/struct_shmid_ds.h      | 46 +++++++++++++++++
 sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h  | 28 -----------
 .../linux/sparc/bits/types/struct_shmid_ds.h  | 45 +++++++++++++++++
 12 files changed, 198 insertions(+), 172 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/bits/shm-pad.h
 delete mode 100644 sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h
 create mode 100644 sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h
 delete mode 100644 sysdeps/unix/sysv/linux/mips/bits/shm-pad.h
 create mode 100644 sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h
 delete mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h
 create mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h
 delete mode 100644 sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h
 create mode 100644 sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h

-- 
2.25.1

Comments

H.J. Lu via Libc-alpha July 7, 2020, 7:57 p.m. | #1
On 6/30/20 3:24 PM, Adhemerval Zanella via Libc-alpha wrote:
> Each architecture overrides the struct msqid_ds which its required

> kernel ABI one.


OK for master.

No regressions on x86_64 and i686.

Tested-by: Carlos O'Donell <carlos@redhat.com>

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

 
> Checked on x86_64-linux-gnu and some bases sysvipc tests on hppa,

> mips, mipsle, mips64, mips64le, sparc64, sparcv9, powerpc64le,

> powerpc64, and powerpc.

> ---

>  sysdeps/unix/sysv/linux/Makefile              |  2 +-

>  sysdeps/unix/sysv/linux/bits/shm-pad.h        | 37 --------------

>  sysdeps/unix/sysv/linux/bits/shm.h            |  1 -

>  .../sysv/linux/bits/types/struct_shmid_ds.h   | 34 +++++--------

>  sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h   | 28 -----------

>  .../linux/hppa/bits/types/struct_shmid_ds.h   | 46 +++++++++++++++++

>  sysdeps/unix/sysv/linux/mips/bits/shm-pad.h   | 26 ----------

>  .../linux/mips/bits/types/struct_shmid_ds.h   | 49 +++++++++++++++++++

>  .../unix/sysv/linux/powerpc/bits/shm-pad.h    | 28 -----------

>  .../powerpc/bits/types/struct_shmid_ds.h      | 46 +++++++++++++++++

>  sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h  | 28 -----------

>  .../linux/sparc/bits/types/struct_shmid_ds.h  | 45 +++++++++++++++++

>  12 files changed, 198 insertions(+), 172 deletions(-)

>  delete mode 100644 sysdeps/unix/sysv/linux/bits/shm-pad.h

>  delete mode 100644 sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h

>  create mode 100644 sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h

>  delete mode 100644 sysdeps/unix/sysv/linux/mips/bits/shm-pad.h

>  create mode 100644 sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h

>  delete mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h

>  create mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h

>  delete mode 100644 sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h

>  create mode 100644 sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h

> 

> diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile

> index bdd187af73..fd0c313041 100644

> --- a/sysdeps/unix/sysv/linux/Makefile

> +++ b/sysdeps/unix/sysv/linux/Makefile

> @@ -85,7 +85,7 @@ sysdep_headers += sys/mount.h sys/acct.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/shmlba.h bits/shm-pad.h \

> +		  bits/shmlba.h \


OK. Remove shm-pad.h.

>  		  bits/termios-struct.h bits/termios-c_cc.h \

>  		  bits/termios-c_iflag.h bits/termios-c_oflag.h \

>  		  bits/termios-baud.h bits/termios-c_cflag.h \

> diff --git a/sysdeps/unix/sysv/linux/bits/shm-pad.h b/sysdeps/unix/sysv/linux/bits/shm-pad.h

> deleted file mode 100644

> index 565e0e344b..0000000000

> --- a/sysdeps/unix/sysv/linux/bits/shm-pad.h

> +++ /dev/null

> @@ -1,37 +0,0 @@

> -/* Define where padding goes in struct shmid_ds.  Generic version.

> -   Copyright (C) 2018-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#ifndef _SYS_SHM_H

> -# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."

> -#endif

> -

> -#include <bits/timesize.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,

> -   or include it despite being 64-bit.  Furthermore, some

> -   architectures place shm_segsz after the time fields rather than

> -   before them, with or without padding there.  This must match the

> -   layout used for struct shmid64_ds in <asm/shmbuf.h>, as glibc does

> -   not do layout conversions for this structure.  */

> -

> -#define __SHM_PAD_AFTER_TIME (__TIMESIZE == 32)

> -#define __SHM_PAD_BEFORE_TIME 0

> -#define __SHM_SEGSZ_AFTER_TIME 0

> -#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0


OK. Remove this padding, but now we'll have to define it explicilty for each arch
which in many ways is cleaner.

> diff --git a/sysdeps/unix/sysv/linux/bits/shm.h b/sysdeps/unix/sysv/linux/bits/shm.h

> index 9ef6aeaf92..f6aefa17f2 100644

> --- a/sysdeps/unix/sysv/linux/bits/shm.h

> +++ b/sysdeps/unix/sysv/linux/bits/shm.h

> @@ -22,7 +22,6 @@

>  #include <bits/types.h>

>  #include <bits/wordsize.h>

>  #include <bits/shmlba.h>

> -#include <bits/shm-pad.h>

>  

>  /* Permission flag for shmget.  */

>  #define SHM_R		0400		/* or S_IRUGO from <linux/stat.h> */

> diff --git a/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h

> index 938bbedfcd..61ed4a08c3 100644

> --- a/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h

> +++ b/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h

> @@ -20,34 +20,22 @@

>  # error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."

>  #endif

>  

> -#include <bits/shm-pad.h>

> -

> -#if __SHM_PAD_BEFORE_TIME

> -# define __SHM_PAD_TIME(NAME, RES)				\

> -  unsigned long int __glibc_reserved ## RES; __time_t NAME

> -#elif __SHM_PAD_AFTER_TIME

> -# define __SHM_PAD_TIME(NAME, RES)				\

> -  __time_t NAME; unsigned long int __glibc_reserved ## RES

> -#else

> -# define __SHM_PAD_TIME(NAME, RES)		\

> -  __time_t NAME

> -#endif

> -

>  /* Data structure describing a shared memory segment.  */

>  struct shmid_ds

>    {

>      struct ipc_perm shm_perm;		/* operation permission struct */

> -#if !__SHM_SEGSZ_AFTER_TIME

> -    size_t shm_segsz;			/* size of segment in bytes */

> -#endif

> -    __SHM_PAD_TIME (shm_atime, 1);	/* time of last shmat() */

> -    __SHM_PAD_TIME (shm_dtime, 2);	/* time of last shmdt() */

> -    __SHM_PAD_TIME (shm_ctime, 3);	/* time of last change by shmctl() */

> -#if __SHM_PAD_BETWEEN_TIME_AND_SEGSZ

> -    unsigned long int __glibc_reserved4;

> -#endif

> -#if __SHM_SEGSZ_AFTER_TIME

>      size_t shm_segsz;			/* size of segment in bytes */

> +#if __TIMESIZE == 32

> +    __time_t shm_atime;			/* time of last shmat() */

> +    unsigned long int __glibc_reserved1;

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    unsigned long int __glibc_reserved2;

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +    unsigned long int __glibc_reserved3;

> +#else

> +    __time_t shm_atime;			/* time of last shmat() */

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    __time_t shm_ctime;			/* time of last change by shmctl() */


OK.

>  #endif

>      __pid_t shm_cpid;			/* pid of creator */

>      __pid_t shm_lpid;			/* pid of last shmop */

> diff --git a/sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h b/sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h

> deleted file mode 100644

> index d0811fe543..0000000000

> --- a/sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h

> +++ /dev/null

> @@ -1,28 +0,0 @@

> -/* Define where padding goes in struct shmid_ds.  HPPA version.

> -   Copyright (C) 2018-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#ifndef _SYS_SHM_H

> -# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."

> -#endif

> -

> -#include <bits/timesize.h>

> -

> -#define __SHM_PAD_AFTER_TIME 0

> -#define __SHM_PAD_BEFORE_TIME (__TIMESIZE == 32)

> -#define __SHM_SEGSZ_AFTER_TIME 1

> -#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ (__TIMESIZE == 32)


OK.

> diff --git a/sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h

> new file mode 100644

> index 0000000000..1ebf222eac

> --- /dev/null

> +++ b/sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h

> @@ -0,0 +1,46 @@

> +/* Linux/HPPA implementation of the shared memory struct shmid_ds.

> +   Copyright (C) 2020 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

> +   <https://www.gnu.org/licenses/>.  */

> +

> +#ifndef _SYS_SHM_H

> +# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."

> +#endif

> +

> +/* Data structure describing a shared memory segment.  */

> +struct shmid_ds

> +  {

> +    struct ipc_perm shm_perm;		/* operation permission struct */

> +#if __TIMESIZE == 32

> +    unsigned long int __glibc_reserved1;

> +    __time_t shm_atime;			/* time of last shmat() */

> +    unsigned long int __glibc_reserved2;

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    unsigned long int __glibc_reserved3;

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +    unsigned long int __glibc_reserved4;


OK.

> +#else

> +    __time_t shm_atime;			/* time of last shmat() */

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +#endif

> +    size_t shm_segsz;			/* size of segment in bytes */

> +    __pid_t shm_cpid;			/* pid of creator */

> +    __pid_t shm_lpid;			/* pid of last shmop */

> +    shmatt_t shm_nattch;		/* number of current attaches */

> +    __syscall_ulong_t __glibc_reserved5;

> +    __syscall_ulong_t __glibc_reserved6;

> +  };

> diff --git a/sysdeps/unix/sysv/linux/mips/bits/shm-pad.h b/sysdeps/unix/sysv/linux/mips/bits/shm-pad.h

> deleted file mode 100644

> index 5a475a64f9..0000000000

> --- a/sysdeps/unix/sysv/linux/mips/bits/shm-pad.h

> +++ /dev/null

> @@ -1,26 +0,0 @@

> -/* Define where padding goes in struct shmid_ds.  MIPS version.

> -   Copyright (C) 2018-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#ifndef _SYS_SHM_H

> -# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."

> -#endif

> -

> -#define __SHM_PAD_AFTER_TIME 0

> -#define __SHM_PAD_BEFORE_TIME 0

> -#define __SHM_SEGSZ_AFTER_TIME 0

> -#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0


OK.

> diff --git a/sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h

> new file mode 100644

> index 0000000000..8e13928980

> --- /dev/null

> +++ b/sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h

> @@ -0,0 +1,49 @@

> +/* Linux/MIPS implementation of the shared memory struct shmid_ds.

> +   Copyright (C) 2020 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

> +   <https://www.gnu.org/licenses/>.  */

> +

> +#ifndef _SYS_SHM_H

> +# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."

> +#endif

> +

> +/* Data structure describing a shared memory segment.  */

> +struct shmid_ds

> +  {

> +    struct ipc_perm shm_perm;		/* operation permission struct */

> +    size_t shm_segsz;			/* size of segment in bytes */

> +#if __TIMESIZE == 32

> +    __time_t shm_atime;			/* time of last shmat() */

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +#else

> +    __time_t shm_atime;			/* time of last shmat() */

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +#endif

> +    __pid_t shm_cpid;			/* pid of creator */

> +    __pid_t shm_lpid;			/* pid of last shmop */

> +    shmatt_t shm_nattch;		/* number of current attaches */

> +#if __TIMESIZE == 32

> +    unsigned short int __glibc_reserved1;

> +    unsigned short int __glibc_reserved2;

> +    unsigned short int __glibc_reserved3;

> +    unsigned short int __glibc_reserved4;

> +#else

> +    __syscall_ulong_t __glibc_reserved5;

> +    __syscall_ulong_t __glibc_reserved6;


OK.

> +#endif

> +  };

> diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h b/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h

> deleted file mode 100644

> index 34cbdb2a0d..0000000000

> --- a/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h

> +++ /dev/null

> @@ -1,28 +0,0 @@

> -/* Define where padding goes in struct shmid_ds.  PowerPC version.

> -   Copyright (C) 2018-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#ifndef _SYS_SHM_H

> -# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."

> -#endif

> -

> -#include <bits/timesize.h>

> -

> -#define __SHM_PAD_AFTER_TIME 0

> -#define __SHM_PAD_BEFORE_TIME (__TIMESIZE == 32)

> -#define __SHM_SEGSZ_AFTER_TIME 1

> -#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ (__TIMESIZE == 32)


OK.

> diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h

> new file mode 100644

> index 0000000000..b0816fb16a

> --- /dev/null

> +++ b/sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h

> @@ -0,0 +1,46 @@

> +/* Linux/PowerPC implementation of the shared memory struct shmid_ds.

> +   Copyright (C) 2020 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

> +   <https://www.gnu.org/licenses/>.  */

> +

> +#ifndef _SYS_SHM_H

> +# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."

> +#endif

> +

> +/* Data structure describing a shared memory segment.  */

> +struct shmid_ds

> +  {

> +    struct ipc_perm shm_perm;		/* operation permission struct */

> +#if __TIMESIZE == 32

> +    unsigned long int __glibc_reserved1;

> +    __time_t shm_atime;			/* time of last shmat() */

> +    unsigned long int __glibc_reserved2;

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    unsigned long int __glibc_reserved3;

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +    unsigned long int __glibc_reserved4;

> +#else

> +    __time_t shm_atime;			/* time of last shmat() */

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +#endif


OK.

> +    size_t shm_segsz;			/* size of segment in bytes */

> +    __pid_t shm_cpid;			/* pid of creator */

> +    __pid_t shm_lpid;			/* pid of last shmop */

> +    shmatt_t shm_nattch;		/* number of current attaches */

> +    __syscall_ulong_t __glibc_reserved5;

> +    __syscall_ulong_t __glibc_reserved6;

> +  };

> diff --git a/sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h b/sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h

> deleted file mode 100644

> index cd0b1fe543..0000000000

> --- a/sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h

> +++ /dev/null

> @@ -1,28 +0,0 @@

> -/* Define where padding goes in struct shmid_ds.  SPARC version.

> -   Copyright (C) 2018-2020 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

> -   <https://www.gnu.org/licenses/>.  */

> -

> -#ifndef _SYS_SHM_H

> -# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."

> -#endif

> -

> -#include <bits/timesize.h>

> -

> -#define __SHM_PAD_AFTER_TIME 0

> -#define __SHM_PAD_BEFORE_TIME (__TIMESIZE == 32)

> -#define __SHM_SEGSZ_AFTER_TIME 1

> -#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0

> diff --git a/sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h

> new file mode 100644

> index 0000000000..d5fb61d374

> --- /dev/null

> +++ b/sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h

> @@ -0,0 +1,45 @@

> +/* Linux/SPARC implementation of the shared memory struct shmid_ds.

> +   Copyright (C) 2020 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

> +   <https://www.gnu.org/licenses/>.  */

> +

> +#ifndef _SYS_SHM_H

> +# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."

> +#endif

> +

> +/* Data structure describing a shared memory segment.  */

> +struct shmid_ds

> +  {

> +    struct ipc_perm shm_perm;		/* operation permission struct */

> +#if __TIMESIZE == 32

> +    unsigned long int __glibc_reserved1;

> +    __time_t shm_atime;			/* time of last shmat() */

> +    unsigned long int __glibc_reserved2;

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    unsigned long int __glibc_reserved3;

> +    __time_t shm_ctime;			/* time of last change by shmctl() */

> +#else

> +    __time_t shm_atime;			/* time of last shmat() */

> +    __time_t shm_dtime;			/* time of last shmdt() */

> +    __time_t shm_ctime;			/* time of last change by shmctl() */


OK.

> +#endif

> +    size_t shm_segsz;			/* size of segment in bytes */

> +    __pid_t shm_cpid;			/* pid of creator */

> +    __pid_t shm_lpid;			/* pid of last shmop */

> +    shmatt_t shm_nattch;		/* number of current attaches */

> +    __syscall_ulong_t __glibc_reserved5;

> +    __syscall_ulong_t __glibc_reserved6;

> +  };

> 



-- 
Cheers,
Carlos.

Patch

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index bdd187af73..fd0c313041 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -85,7 +85,7 @@  sysdep_headers += sys/mount.h sys/acct.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/shmlba.h bits/shm-pad.h \
+		  bits/shmlba.h \
 		  bits/termios-struct.h bits/termios-c_cc.h \
 		  bits/termios-c_iflag.h bits/termios-c_oflag.h \
 		  bits/termios-baud.h bits/termios-c_cflag.h \
diff --git a/sysdeps/unix/sysv/linux/bits/shm-pad.h b/sysdeps/unix/sysv/linux/bits/shm-pad.h
deleted file mode 100644
index 565e0e344b..0000000000
--- a/sysdeps/unix/sysv/linux/bits/shm-pad.h
+++ /dev/null
@@ -1,37 +0,0 @@ 
-/* Define where padding goes in struct shmid_ds.  Generic version.
-   Copyright (C) 2018-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_SHM_H
-# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."
-#endif
-
-#include <bits/timesize.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,
-   or include it despite being 64-bit.  Furthermore, some
-   architectures place shm_segsz after the time fields rather than
-   before them, with or without padding there.  This must match the
-   layout used for struct shmid64_ds in <asm/shmbuf.h>, as glibc does
-   not do layout conversions for this structure.  */
-
-#define __SHM_PAD_AFTER_TIME (__TIMESIZE == 32)
-#define __SHM_PAD_BEFORE_TIME 0
-#define __SHM_SEGSZ_AFTER_TIME 0
-#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0
diff --git a/sysdeps/unix/sysv/linux/bits/shm.h b/sysdeps/unix/sysv/linux/bits/shm.h
index 9ef6aeaf92..f6aefa17f2 100644
--- a/sysdeps/unix/sysv/linux/bits/shm.h
+++ b/sysdeps/unix/sysv/linux/bits/shm.h
@@ -22,7 +22,6 @@ 
 #include <bits/types.h>
 #include <bits/wordsize.h>
 #include <bits/shmlba.h>
-#include <bits/shm-pad.h>
 
 /* Permission flag for shmget.  */
 #define SHM_R		0400		/* or S_IRUGO from <linux/stat.h> */
diff --git a/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h
index 938bbedfcd..61ed4a08c3 100644
--- a/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h
+++ b/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h
@@ -20,34 +20,22 @@ 
 # error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
 #endif
 
-#include <bits/shm-pad.h>
-
-#if __SHM_PAD_BEFORE_TIME
-# define __SHM_PAD_TIME(NAME, RES)				\
-  unsigned long int __glibc_reserved ## RES; __time_t NAME
-#elif __SHM_PAD_AFTER_TIME
-# define __SHM_PAD_TIME(NAME, RES)				\
-  __time_t NAME; unsigned long int __glibc_reserved ## RES
-#else
-# define __SHM_PAD_TIME(NAME, RES)		\
-  __time_t NAME
-#endif
-
 /* Data structure describing a shared memory segment.  */
 struct shmid_ds
   {
     struct ipc_perm shm_perm;		/* operation permission struct */
-#if !__SHM_SEGSZ_AFTER_TIME
-    size_t shm_segsz;			/* size of segment in bytes */
-#endif
-    __SHM_PAD_TIME (shm_atime, 1);	/* time of last shmat() */
-    __SHM_PAD_TIME (shm_dtime, 2);	/* time of last shmdt() */
-    __SHM_PAD_TIME (shm_ctime, 3);	/* time of last change by shmctl() */
-#if __SHM_PAD_BETWEEN_TIME_AND_SEGSZ
-    unsigned long int __glibc_reserved4;
-#endif
-#if __SHM_SEGSZ_AFTER_TIME
     size_t shm_segsz;			/* size of segment in bytes */
+#if __TIMESIZE == 32
+    __time_t shm_atime;			/* time of last shmat() */
+    unsigned long int __glibc_reserved1;
+    __time_t shm_dtime;			/* time of last shmdt() */
+    unsigned long int __glibc_reserved2;
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+    unsigned long int __glibc_reserved3;
+#else
+    __time_t shm_atime;			/* time of last shmat() */
+    __time_t shm_dtime;			/* time of last shmdt() */
+    __time_t shm_ctime;			/* time of last change by shmctl() */
 #endif
     __pid_t shm_cpid;			/* pid of creator */
     __pid_t shm_lpid;			/* pid of last shmop */
diff --git a/sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h b/sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h
deleted file mode 100644
index d0811fe543..0000000000
--- a/sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h
+++ /dev/null
@@ -1,28 +0,0 @@ 
-/* Define where padding goes in struct shmid_ds.  HPPA version.
-   Copyright (C) 2018-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_SHM_H
-# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."
-#endif
-
-#include <bits/timesize.h>
-
-#define __SHM_PAD_AFTER_TIME 0
-#define __SHM_PAD_BEFORE_TIME (__TIMESIZE == 32)
-#define __SHM_SEGSZ_AFTER_TIME 1
-#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ (__TIMESIZE == 32)
diff --git a/sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h
new file mode 100644
index 0000000000..1ebf222eac
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/hppa/bits/types/struct_shmid_ds.h
@@ -0,0 +1,46 @@ 
+/* Linux/HPPA implementation of the shared memory struct shmid_ds.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
+#endif
+
+/* Data structure describing a shared memory segment.  */
+struct shmid_ds
+  {
+    struct ipc_perm shm_perm;		/* operation permission struct */
+#if __TIMESIZE == 32
+    unsigned long int __glibc_reserved1;
+    __time_t shm_atime;			/* time of last shmat() */
+    unsigned long int __glibc_reserved2;
+    __time_t shm_dtime;			/* time of last shmdt() */
+    unsigned long int __glibc_reserved3;
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+    unsigned long int __glibc_reserved4;
+#else
+    __time_t shm_atime;			/* time of last shmat() */
+    __time_t shm_dtime;			/* time of last shmdt() */
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+#endif
+    size_t shm_segsz;			/* size of segment in bytes */
+    __pid_t shm_cpid;			/* pid of creator */
+    __pid_t shm_lpid;			/* pid of last shmop */
+    shmatt_t shm_nattch;		/* number of current attaches */
+    __syscall_ulong_t __glibc_reserved5;
+    __syscall_ulong_t __glibc_reserved6;
+  };
diff --git a/sysdeps/unix/sysv/linux/mips/bits/shm-pad.h b/sysdeps/unix/sysv/linux/mips/bits/shm-pad.h
deleted file mode 100644
index 5a475a64f9..0000000000
--- a/sysdeps/unix/sysv/linux/mips/bits/shm-pad.h
+++ /dev/null
@@ -1,26 +0,0 @@ 
-/* Define where padding goes in struct shmid_ds.  MIPS version.
-   Copyright (C) 2018-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_SHM_H
-# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."
-#endif
-
-#define __SHM_PAD_AFTER_TIME 0
-#define __SHM_PAD_BEFORE_TIME 0
-#define __SHM_SEGSZ_AFTER_TIME 0
-#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0
diff --git a/sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h
new file mode 100644
index 0000000000..8e13928980
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/bits/types/struct_shmid_ds.h
@@ -0,0 +1,49 @@ 
+/* Linux/MIPS implementation of the shared memory struct shmid_ds.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
+#endif
+
+/* Data structure describing a shared memory segment.  */
+struct shmid_ds
+  {
+    struct ipc_perm shm_perm;		/* operation permission struct */
+    size_t shm_segsz;			/* size of segment in bytes */
+#if __TIMESIZE == 32
+    __time_t shm_atime;			/* time of last shmat() */
+    __time_t shm_dtime;			/* time of last shmdt() */
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+#else
+    __time_t shm_atime;			/* time of last shmat() */
+    __time_t shm_dtime;			/* time of last shmdt() */
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+#endif
+    __pid_t shm_cpid;			/* pid of creator */
+    __pid_t shm_lpid;			/* pid of last shmop */
+    shmatt_t shm_nattch;		/* number of current attaches */
+#if __TIMESIZE == 32
+    unsigned short int __glibc_reserved1;
+    unsigned short int __glibc_reserved2;
+    unsigned short int __glibc_reserved3;
+    unsigned short int __glibc_reserved4;
+#else
+    __syscall_ulong_t __glibc_reserved5;
+    __syscall_ulong_t __glibc_reserved6;
+#endif
+  };
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h b/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h
deleted file mode 100644
index 34cbdb2a0d..0000000000
--- a/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h
+++ /dev/null
@@ -1,28 +0,0 @@ 
-/* Define where padding goes in struct shmid_ds.  PowerPC version.
-   Copyright (C) 2018-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_SHM_H
-# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."
-#endif
-
-#include <bits/timesize.h>
-
-#define __SHM_PAD_AFTER_TIME 0
-#define __SHM_PAD_BEFORE_TIME (__TIMESIZE == 32)
-#define __SHM_SEGSZ_AFTER_TIME 1
-#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ (__TIMESIZE == 32)
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h
new file mode 100644
index 0000000000..b0816fb16a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/types/struct_shmid_ds.h
@@ -0,0 +1,46 @@ 
+/* Linux/PowerPC implementation of the shared memory struct shmid_ds.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
+#endif
+
+/* Data structure describing a shared memory segment.  */
+struct shmid_ds
+  {
+    struct ipc_perm shm_perm;		/* operation permission struct */
+#if __TIMESIZE == 32
+    unsigned long int __glibc_reserved1;
+    __time_t shm_atime;			/* time of last shmat() */
+    unsigned long int __glibc_reserved2;
+    __time_t shm_dtime;			/* time of last shmdt() */
+    unsigned long int __glibc_reserved3;
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+    unsigned long int __glibc_reserved4;
+#else
+    __time_t shm_atime;			/* time of last shmat() */
+    __time_t shm_dtime;			/* time of last shmdt() */
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+#endif
+    size_t shm_segsz;			/* size of segment in bytes */
+    __pid_t shm_cpid;			/* pid of creator */
+    __pid_t shm_lpid;			/* pid of last shmop */
+    shmatt_t shm_nattch;		/* number of current attaches */
+    __syscall_ulong_t __glibc_reserved5;
+    __syscall_ulong_t __glibc_reserved6;
+  };
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h b/sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h
deleted file mode 100644
index cd0b1fe543..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h
+++ /dev/null
@@ -1,28 +0,0 @@ 
-/* Define where padding goes in struct shmid_ds.  SPARC version.
-   Copyright (C) 2018-2020 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
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_SHM_H
-# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."
-#endif
-
-#include <bits/timesize.h>
-
-#define __SHM_PAD_AFTER_TIME 0
-#define __SHM_PAD_BEFORE_TIME (__TIMESIZE == 32)
-#define __SHM_SEGSZ_AFTER_TIME 1
-#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h
new file mode 100644
index 0000000000..d5fb61d374
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/bits/types/struct_shmid_ds.h
@@ -0,0 +1,45 @@ 
+/* Linux/SPARC implementation of the shared memory struct shmid_ds.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
+#endif
+
+/* Data structure describing a shared memory segment.  */
+struct shmid_ds
+  {
+    struct ipc_perm shm_perm;		/* operation permission struct */
+#if __TIMESIZE == 32
+    unsigned long int __glibc_reserved1;
+    __time_t shm_atime;			/* time of last shmat() */
+    unsigned long int __glibc_reserved2;
+    __time_t shm_dtime;			/* time of last shmdt() */
+    unsigned long int __glibc_reserved3;
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+#else
+    __time_t shm_atime;			/* time of last shmat() */
+    __time_t shm_dtime;			/* time of last shmdt() */
+    __time_t shm_ctime;			/* time of last change by shmctl() */
+#endif
+    size_t shm_segsz;			/* size of segment in bytes */
+    __pid_t shm_cpid;			/* pid of creator */
+    __pid_t shm_lpid;			/* pid of last shmop */
+    shmatt_t shm_nattch;		/* number of current attaches */
+    __syscall_ulong_t __glibc_reserved5;
+    __syscall_ulong_t __glibc_reserved6;
+  };