Re: [PATCH 16/17] arch: remove HAVE_COPY_THREAD_TLS

Re: [PATCH 16/17] arch: remove HAVE_COPY_THREAD_TLS

[Thomas Bogendoerfer]

On Tue, Jun 23, 2020 at 01:43:25AM +0200, Christian Brauner wrote:
> All architectures support copy_thread_tls() now, so remove the legacy
> copy_thread() function and the HAVE_COPY_THREAD_TLS config option. Everyone
> uses the same process creation calling convention based on
> copy_thread_tls() and struct kernel_clone_args. This will make it easier to
> maintain the core process creation code under kernel/, simplifies the
> callpaths and makes the identical for all architectures.
> [..] 
>  arch/mips/Kconfig          |  1 -

Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]

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Re: [PATCH 17/17] arch: rename copy_thread_tls() back to copy_thread()

[Thomas Bogendoerfer]

On Tue, Jun 23, 2020 at 01:43:26AM +0200, Christian Brauner wrote:
> Now that HAVE_COPY_THREAD_TLS has been removed, rename copy_thread_tls()
> back simply copy_thread(). It's a simpler name, and doesn't imply that only
> tls is copied here. This finishes an outstanding chunk of internal process
> creation work since we've added clone3().
> [..]
>  arch/mips/kernel/process.c       | 2 +-

Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]

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Re: [PATCH 17/17] arch: rename copy_thread_tls() back to copy_thread()

[Stafford Horne]

On Tue, Jun 23, 2020 at 01:43:26AM +0200, Christian Brauner wrote:

> diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
> index d7010e72450c..19045a3efb8a 100644
> --- a/arch/openrisc/kernel/process.c
> +++ b/arch/openrisc/kernel/process.c
> @@ -116,7 +116,7 @@ void release_thread(struct task_struct *dead_task)
>  extern asmlinkage void ret_from_fork(void);
>  
>  /*
> - * copy_thread_tls
> + * copy_thread
>   * @clone_flags: flags
>   * @usp: user stack pointer or fn for kernel thread
>   * @arg: arg to fn for kernel thread; always NULL for userspace thread
> @@ -147,7 +147,7 @@ extern asmlinkage void ret_from_fork(void);
>   */
>  
>  int
> -copy_thread_tls(unsigned long clone_flags, unsigned long usp,
> +copy_thread(unsigned long clone_flags, unsigned long usp,
>  		unsigned long arg, struct task_struct *p, unsigned long tls)
>  {

For the OpenRISC bit.

Acked-by: Stafford Horne <shorne@gmail.com>

Also, I would agree with what Kees mentioned about aligning the parameters.
Sure that would be more work but it would be appreciated.

-Stafford

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Re: [PATCH 16/17] arch: remove HAVE_COPY_THREAD_TLS

[Greentime Hu]

Christian Brauner <christian.brauner@ubuntu.com> 於 2020年6月23日 週二 上午7:46寫道：
>
> All architectures support copy_thread_tls() now, so remove the legacy
> copy_thread() function and the HAVE_COPY_THREAD_TLS config option. Everyone
> uses the same process creation calling convention based on
> copy_thread_tls() and struct kernel_clone_args. This will make it easier to
> maintain the core process creation code under kernel/, simplifies the
> callpaths and makes the identical for all architectures.
>
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
> Cc: Matt Turner <mattst88@gmail.com>
> Cc: Vineet Gupta <vgupta@synopsys.com>
> Cc: Russell King <linux@armlinux.org.uk>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Mark Salter <msalter@redhat.com>
> Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
> Cc: Guo Ren <guoren@kernel.org>
> Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
> Cc: Brian Cain <bcain@codeaurora.org>
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Fenghua Yu <fenghua.yu@intel.com>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Cc: Michal Simek <monstr@monstr.eu>
> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
> Cc: Nick Hu <nickhu@andestech.com>
> Cc: Greentime Hu <green.hu@gmail.com>
> Cc: Vincent Chen <deanbo422@gmail.com>
> Cc: Ley Foon Tan <ley.foon.tan@intel.com>
> Cc: Jonas Bonn <jonas@southpole.se>
> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
> Cc: Stafford Horne <shorne@gmail.com>
> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
> Cc: Helge Deller <deller@gmx.de>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Paul Walmsley <paul.walmsley@sifive.com>
> Cc: Palmer Dabbelt <palmer@dabbelt.com>
> Cc: Albert Ou <aou@eecs.berkeley.edu>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: Vasily Gorbik <gor@linux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Rich Felker <dalias@libc.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jeff Dike <jdike@addtoit.com>
> Cc: Richard Weinberger <richard@nod.at>
> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
> Cc: Guan Xuetao <gxt@pku.edu.cn>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: x86@kernel.org
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Mike Rapoport <rppt@linux.ibm.com>
> Cc: "Matthew Wilcox
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-alpha@vger.kernel.org
> Cc: linux-snps-arc@lists.infradead.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-c6x-dev@linux-c6x.org
> Cc: linux-csky@vger.kernel.org
> Cc: uclinux-h8-devel@lists.sourceforge.jp
> Cc: linux-hexagon@vger.kernel.org
> Cc: linux-ia64@vger.kernel.org
> Cc: linux-m68k@lists.linux-m68k.org
> Cc: linux-mips@vger.kernel.org
> Cc: openrisc@lists.librecores.org
> Cc: linux-parisc@vger.kernel.org
> Cc: linuxppc-dev@lists.ozlabs.org
> Cc: linux-riscv@lists.infradead.org
> Cc: linux-s390@vger.kernel.org
> Cc: linux-sh@vger.kernel.org
> Cc: sparclinux@vger.kernel.org
> Cc: linux-um@lists.infradead.org
> Cc: linux-xtensa@linux-xtensa.org
> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
> [...]
> diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig
> index 7b6eaca81cce..e30298e99e1b 100644
> --- a/arch/nds32/Kconfig
> +++ b/arch/nds32/Kconfig
> @@ -48,7 +48,6 @@ config NDS32
>         select HAVE_FUNCTION_GRAPH_TRACER
>         select HAVE_FTRACE_MCOUNT_RECORD
>         select HAVE_DYNAMIC_FTRACE
> -       select HAVE_COPY_THREAD_TLS
>         help
>           Andes(nds32) Linux support.

Hi Christian, Thank you.
Acked-by: Greentime Hu <green.hu@gmail.com>

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Re: [PATCH 17/17] arch: rename copy_thread_tls() back to copy_thread()

[Greentime Hu]

Christian Brauner <christian.brauner@ubuntu.com> 於 2020年6月23日 週二 上午7:58寫道：
>
> Now that HAVE_COPY_THREAD_TLS has been removed, rename copy_thread_tls()
> back simply copy_thread(). It's a simpler name, and doesn't imply that only
> tls is copied here. This finishes an outstanding chunk of internal process
> creation work since we've added clone3().
>
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
> Cc: Matt Turner <mattst88@gmail.com>
> Cc: Vineet Gupta <vgupta@synopsys.com>
> Cc: Russell King <linux@armlinux.org.uk>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Mark Salter <msalter@redhat.com>
> Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
> Cc: Guo Ren <guoren@kernel.org>
> Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
> Cc: Brian Cain <bcain@codeaurora.org>
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Fenghua Yu <fenghua.yu@intel.com>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Cc: Michal Simek <monstr@monstr.eu>
> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
> Cc: Nick Hu <nickhu@andestech.com>
> Cc: Greentime Hu <green.hu@gmail.com>
> Cc: Vincent Chen <deanbo422@gmail.com>
> Cc: Ley Foon Tan <ley.foon.tan@intel.com>
> Cc: Jonas Bonn <jonas@southpole.se>
> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
> Cc: Stafford Horne <shorne@gmail.com>
> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
> Cc: Helge Deller <deller@gmx.de>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Paul Walmsley <paul.walmsley@sifive.com>
> Cc: Palmer Dabbelt <palmer@dabbelt.com>
> Cc: Albert Ou <aou@eecs.berkeley.edu>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Rich Felker <dalias@libc.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jeff Dike <jdike@addtoit.com>
> Cc: Richard Weinberger <richard@nod.at>
> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
> Cc: Guan Xuetao <gxt@pku.edu.cn>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: x86@kernel.org
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Chris Zankel <chris@zankel.net>
> Cc: Max Filippov <jcmvbkbc@gmail.com>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> Cc: linux-alpha@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-snps-arc@lists.infradead.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-c6x-dev@linux-c6x.org
> Cc: linux-csky@vger.kernel.org
> Cc: uclinux-h8-devel@lists.sourceforge.jp
> Cc: linux-hexagon@vger.kernel.org
> Cc: linux-ia64@vger.kernel.org
> Cc: linux-m68k@lists.linux-m68k.org
> Cc: linux-mips@vger.kernel.org
> Cc: openrisc@lists.librecores.org
> Cc: linux-parisc@vger.kernel.org
> Cc: linuxppc-dev@lists.ozlabs.org
> Cc: linux-riscv@lists.infradead.org
> Cc: linux-s390@vger.kernel.org
> Cc: linux-sh@vger.kernel.org
> Cc: sparclinux@vger.kernel.org
> Cc: linux-um@lists.infradead.org
> Cc: linux-xtensa@linux-xtensa.org
> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
> ---
>  arch/alpha/kernel/process.c      | 2 +-
>  arch/arc/kernel/process.c        | 2 +-
>  arch/arm/kernel/process.c        | 2 +-
>  arch/arm64/kernel/process.c      | 2 +-
>  arch/c6x/kernel/process.c        | 2 +-
>  arch/csky/kernel/process.c       | 2 +-
>  arch/h8300/kernel/process.c      | 2 +-
>  arch/hexagon/kernel/process.c    | 2 +-
>  arch/ia64/kernel/process.c       | 4 ++--
>  arch/m68k/kernel/process.c       | 2 +-
>  arch/microblaze/kernel/process.c | 2 +-
>  arch/mips/kernel/process.c       | 2 +-
>  arch/nds32/kernel/process.c      | 2 +-
>  arch/nios2/kernel/process.c      | 2 +-
>  arch/openrisc/kernel/process.c   | 4 ++--
>  arch/parisc/kernel/process.c     | 2 +-
>  arch/powerpc/kernel/process.c    | 2 +-
>  arch/riscv/kernel/process.c      | 2 +-
>  arch/s390/kernel/process.c       | 2 +-
>  arch/sh/kernel/process_32.c      | 2 +-
>  arch/sparc/kernel/process.c      | 6 +++---
>  arch/sparc/kernel/process_32.c   | 2 +-
>  arch/sparc/kernel/process_64.c   | 2 +-
>  arch/um/kernel/process.c         | 2 +-
>  arch/unicore32/kernel/process.c  | 2 +-
>  arch/x86/kernel/process.c        | 2 +-
>  arch/x86/kernel/unwind_frame.c   | 2 +-
>  arch/xtensa/kernel/process.c     | 2 +-
>  include/linux/sched/task.h       | 2 +-
>  kernel/fork.c                    | 2 +-
>  30 files changed, 34 insertions(+), 34 deletions(-)
>
> [...]
> diff --git a/arch/nds32/kernel/process.c b/arch/nds32/kernel/process.c
> index 7dbb1bf64165..1020e2c6dcd8 100644
> --- a/arch/nds32/kernel/process.c
> +++ b/arch/nds32/kernel/process.c
> @@ -149,7 +149,7 @@ void flush_thread(void)
>  DEFINE_PER_CPU(struct task_struct *, __entry_task);
>
>  asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
> -int copy_thread_tls(unsigned long clone_flags, unsigned long stack_start,
> +int copy_thread(unsigned long clone_flags, unsigned long stack_start,
>                     unsigned long stk_sz, struct task_struct *p,
>                     unsigned long tls)
>  {

Hi Christian, Thank you.
Acked-by: Greentime Hu <green.hu@gmail.com>

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Re: [PATCH 17/17] arch: rename copy_thread_tls() back to copy_thread()

[Christian Brauner]

On Fri, Jun 26, 2020 at 06:17:49AM +0900, Stafford Horne wrote:
> On Tue, Jun 23, 2020 at 01:43:26AM +0200, Christian Brauner wrote:
> 
> > diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
> > index d7010e72450c..19045a3efb8a 100644
> > --- a/arch/openrisc/kernel/process.c
> > +++ b/arch/openrisc/kernel/process.c
> > @@ -116,7 +116,7 @@ void release_thread(struct task_struct *dead_task)
> >  extern asmlinkage void ret_from_fork(void);
> >  
> >  /*
> > - * copy_thread_tls
> > + * copy_thread
> >   * @clone_flags: flags
> >   * @usp: user stack pointer or fn for kernel thread
> >   * @arg: arg to fn for kernel thread; always NULL for userspace thread
> > @@ -147,7 +147,7 @@ extern asmlinkage void ret_from_fork(void);
> >   */
> >  
> >  int
> > -copy_thread_tls(unsigned long clone_flags, unsigned long usp,
> > +copy_thread(unsigned long clone_flags, unsigned long usp,
> >  		unsigned long arg, struct task_struct *p, unsigned long tls)
> >  {
> 
> For the OpenRISC bit.
> 
> Acked-by: Stafford Horne <shorne@gmail.com>
> 
> Also, I would agree with what Kees mentioned about aligning the parameters.
> Sure that would be more work but it would be appreciated.

Sure, this is a mechanical change. I'll update the individual patches to account for that.

Thanks!
Christian

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