linux-kernel - Re: [PATCH v7 0/5] parisc: system call table generation support

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Date:   Thu, 15 Nov 2018 20:30:56 +0100
From:   Helge Deller <deller@....de>
To:     Firoz Khan <firoz.khan@...aro.org>, linux-parisc@...r.kernel.org,
        "James E . J . Bottomley" <jejb@...isc-linux.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>
Cc:     y2038@...ts.linaro.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, arnd@...db.de, deepa.kernel@...il.com,
        marcin.juszkiewicz@...aro.org
Subject: Re: [PATCH v7 0/5] parisc: system call table generation support

On 14.11.2018 07:34, Firoz Khan wrote:
> The purpose of this patch series is, we can easily
> add/modify/delete system call table support by cha-
> nging entry in syscall.tbl file instead of manually
> changing many files. The other goal is to unify the
> system call table generation support implementation
> across all the architectures.
> 
> The system call tables are in different format in
> all architecture. It will be difficult to manually
> add, modify or delete the system calls in the resp-
> ective files manually. To make it easy by keeping a
> script and which'll generate uapi header file and
> syscall table file.
> 
> syscall.tbl contains the list of available system
> calls along with system call number and correspond-
> ing entry point. Add a new system call in this arch-
> itecture will be possible by adding new entry in the
> syscall.tbl file.
> 
> Adding a new table entry consisting of:
>         - System call number.
>         - ABI.
>         - System call name.
>         - Entry point name.
> 
> ARM, s390 and x86 architecuture does exist the sim-
> ilar support. I leverage their implementation to
> come up with a generic solution.
> 
> I have done the same support for work for alpha, ia64,
> m68k, microblaze, mips, powerpc, sh, sparc and xtensa.
> Below mentioned git repository contains more details
> about the workflow.
> 
> https://github.com/frzkhn/system_call_table_generator/
> 
> Finally, this is the ground work to solve the Y2038
> issue. We need to add two dozen of system calls to
> solve Y2038 issue. So this patch series will help to
> add new system calls easily by adding new entry in
> the syscall.tbl.
> 
> changes since v6:
>  - changed from generic-y to generated-y in Kbuild.
> 
> changes since v5:
>  - optimized/updated the syscall table generation
>    scripts.
>  - fixed all mixed indentation issues in syscall.tbl.
>  - added "comments" in syscall_*.tbl.
> 
> changes since v4:
>  - optimized/updated the syscall table generation
>    scripts.
>  - removed __IGNORE entries which was added in v2
>    to suppress the warning.
> 
> changes since v3:
>  - optimized/updated the syscall table generation
>    scripts.
>  - added missing new line.
> 
> changes since v2:
>  - updated the syscall.tbl file by including missed
>    entries.
> 
> changes since v1:
>  - enclosed __NR_sycalls macro with __KERNEL__.
> 
> Firoz Khan (5):
>   parisc: move __IGNORE* entries to non uapi header
>   parisc: add __NR_syscalls along with __NR_Linux_syscalls
>   parisc: add system call table generation support
>   parisc: generate uapi header and system call table files
>   parisc: syscalls: ignore nfsservctl for other architectures

Firoz, you may add
Acked-by: Helge Deller <deller@....de>
to the whole parisc series.

Thanks!
Helge


 
>  arch/parisc/Makefile                      |   3 +
>  arch/parisc/include/asm/Kbuild            |   3 +
>  arch/parisc/include/asm/unistd.h          |   8 +
>  arch/parisc/include/uapi/asm/Kbuild       |   2 +
>  arch/parisc/include/uapi/asm/unistd.h     | 382 +------------------------
>  arch/parisc/kernel/syscall.S              |  11 +-
>  arch/parisc/kernel/syscall_table.S        | 459 ------------------------------
>  arch/parisc/kernel/syscalls/Makefile      |  57 ++++
>  arch/parisc/kernel/syscalls/syscall.tbl   | 369 ++++++++++++++++++++++++
>  arch/parisc/kernel/syscalls/syscallhdr.sh |  36 +++
>  arch/parisc/kernel/syscalls/syscalltbl.sh |  36 +++
>  scripts/checksyscalls.sh                  |   1 +
>  12 files changed, 531 insertions(+), 836 deletions(-)
>  delete mode 100644 arch/parisc/kernel/syscall_table.S
>  create mode 100644 arch/parisc/kernel/syscalls/Makefile
>  create mode 100644 arch/parisc/kernel/syscalls/syscall.tbl
>  create mode 100644 arch/parisc/kernel/syscalls/syscallhdr.sh
>  create mode 100644 arch/parisc/kernel/syscalls/syscalltbl.sh
>