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From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Miguel Ojeda <ojeda@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
	Alex Gaynor <alex.gaynor@gmail.com>, Finn Behrens <me@kloenk.de>,
	Adam Bratschi-Kaye <ark.email@gmail.com>,
	Wedson Almeida Filho <wedsonaf@google.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Sven Van Asbroeck <thesven73@gmail.com>,
	Gary Guo <gary@garyguo.net>,
	Boris-Chengbiao Zhou <bobo1239@web.de>,
	Boqun Feng <boqun.feng@gmail.com>,
	Douglas Su <d0u9.su@outlook.com>,
	Dariusz Sosnowski <dsosnowski@dsosnowski.pl>,
	Antonio Terceiro <antonio.terceiro@linaro.org>,
	Daniel Xu <dxu@dxuuu.xyz>, Miguel Cano <macanroj@gmail.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	linux-kbuild@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org
Subject: Re: [PATCH v4 16/20] Kbuild: add Rust support
Date: Sat, 12 Feb 2022 14:16:50 +0000	[thread overview]
Message-ID: <YgfBUhYdLXA46kOX@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220212130410.6901-17-ojeda@kernel.org>

On Sat, Feb 12, 2022 at 02:03:42PM +0100, Miguel Ojeda wrote:
> +config RUST
> +	bool "Rust support"
> +	depends on RUST_IS_AVAILABLE
> +	depends on ARM64 || CPU_32v6 || CPU_32v6K || (PPC64 && CPU_LITTLE_ENDIAN) || X86_64 || RISCV

Please don't use CPU_32v6* here.

It probably makes more sense to add a symbol "HAVE_RUST" and have the
appropriate architecture Kconfig files select HAVE_RUST.

Does Rust support Thumb on ARMv6 and ARMv7 architectures?

> +	depends on !MODVERSIONS
> +	depends on !GCC_PLUGIN_RANDSTRUCT
> +	select CONSTRUCTORS
> +	default n

Please remove every utterance of "default n" from your patch; n is the
default default which default defaults to, so you don't need to specify
default n to make the option default to n. It will default to n purely
because n is the default when no default is specified.

> +	help
> +	  Enables Rust support in the kernel.
> +
> +	  This allows other Rust-related options, like drivers written in Rust,
> +	  to be selected.

As Rust doesn't support all the architectures that the kernel supports,
Rust must not be used for core infrastructure.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

WARNING: multiple messages have this Message-ID (diff)
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Miguel Ojeda <ojeda@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
	Alex Gaynor <alex.gaynor@gmail.com>, Finn Behrens <me@kloenk.de>,
	Adam Bratschi-Kaye <ark.email@gmail.com>,
	Wedson Almeida Filho <wedsonaf@google.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Sven Van Asbroeck <thesven73@gmail.com>,
	Gary Guo <gary@garyguo.net>,
	Boris-Chengbiao Zhou <bobo1239@web.de>,
	Boqun Feng <boqun.feng@gmail.com>,
	Douglas Su <d0u9.su@outlook.com>,
	Dariusz Sosnowski <dsosnowski@dsosnowski.pl>,
	Antonio Terceiro <antonio.terceiro@linaro.org>,
	Daniel Xu <dxu@dxuuu.xyz>, Miguel Cano <macanroj@gmail.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	linux-kbuild@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org
Subject: Re: [PATCH v4 16/20] Kbuild: add Rust support
Date: Sat, 12 Feb 2022 14:16:50 +0000	[thread overview]
Message-ID: <YgfBUhYdLXA46kOX@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220212130410.6901-17-ojeda@kernel.org>

On Sat, Feb 12, 2022 at 02:03:42PM +0100, Miguel Ojeda wrote:
> +config RUST
> +	bool "Rust support"
> +	depends on RUST_IS_AVAILABLE
> +	depends on ARM64 || CPU_32v6 || CPU_32v6K || (PPC64 && CPU_LITTLE_ENDIAN) || X86_64 || RISCV

Please don't use CPU_32v6* here.

It probably makes more sense to add a symbol "HAVE_RUST" and have the
appropriate architecture Kconfig files select HAVE_RUST.

Does Rust support Thumb on ARMv6 and ARMv7 architectures?

> +	depends on !MODVERSIONS
> +	depends on !GCC_PLUGIN_RANDSTRUCT
> +	select CONSTRUCTORS
> +	default n

Please remove every utterance of "default n" from your patch; n is the
default default which default defaults to, so you don't need to specify
default n to make the option default to n. It will default to n purely
because n is the default when no default is specified.

> +	help
> +	  Enables Rust support in the kernel.
> +
> +	  This allows other Rust-related options, like drivers written in Rust,
> +	  to be selected.

As Rust doesn't support all the architectures that the kernel supports,
Rust must not be used for core infrastructure.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

WARNING: multiple messages have this Message-ID (diff)
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Miguel Ojeda <ojeda@kernel.org>
Cc: Sven Van Asbroeck <thesven73@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Miguel Cano <macanroj@gmail.com>,
	Paul Mackerras <paulus@samba.org>, Gary Guo <gary@garyguo.net>,
	Douglas Su <d0u9.su@outlook.com>, Borislav Petkov <bp@alien8.de>,
	linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	x86@kernel.org, Ingo Molnar <mingo@redhat.com>,
	Wedson Almeida Filho <wedsonaf@google.com>,
	Alex Gaynor <alex.gaynor@gmail.com>,
	Antonio Terceiro <antonio.terceiro@linaro.org>,
	Adam Bratschi-Kaye <ark.email@gmail.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	rust-for-linux@vger.kernel.org, linux-kbuild@vger.kernel.org,
	Boqun Feng <boqun.feng@gmail.com>,
	linuxppc-dev@lists.ozlabs.org, Daniel Xu <dxu@dxuuu.xyz>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Dariusz Sosnowski <dsosnowski@dsosnowski.pl>,
	linux-arm-kernel@lists.infradead.org,
	Michal Marek <michal.lkml@markovi.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	linux-kernel@vger.kernel.org,
	Boris-Chengbiao Zhou <bobo1239@web.de>,
	Palmer Dabbelt <palmer@dabbelt.com>, Finn Behrens <me@kloenk.de>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH v4 16/20] Kbuild: add Rust support
Date: Sat, 12 Feb 2022 14:16:50 +0000	[thread overview]
Message-ID: <YgfBUhYdLXA46kOX@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220212130410.6901-17-ojeda@kernel.org>

On Sat, Feb 12, 2022 at 02:03:42PM +0100, Miguel Ojeda wrote:
> +config RUST
> +	bool "Rust support"
> +	depends on RUST_IS_AVAILABLE
> +	depends on ARM64 || CPU_32v6 || CPU_32v6K || (PPC64 && CPU_LITTLE_ENDIAN) || X86_64 || RISCV

Please don't use CPU_32v6* here.

It probably makes more sense to add a symbol "HAVE_RUST" and have the
appropriate architecture Kconfig files select HAVE_RUST.

Does Rust support Thumb on ARMv6 and ARMv7 architectures?

> +	depends on !MODVERSIONS
> +	depends on !GCC_PLUGIN_RANDSTRUCT
> +	select CONSTRUCTORS
> +	default n

Please remove every utterance of "default n" from your patch; n is the
default default which default defaults to, so you don't need to specify
default n to make the option default to n. It will default to n purely
because n is the default when no default is specified.

> +	help
> +	  Enables Rust support in the kernel.
> +
> +	  This allows other Rust-related options, like drivers written in Rust,
> +	  to be selected.

As Rust doesn't support all the architectures that the kernel supports,
Rust must not be used for core infrastructure.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

WARNING: multiple messages have this Message-ID (diff)
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Miguel Ojeda <ojeda@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
	Alex Gaynor <alex.gaynor@gmail.com>, Finn Behrens <me@kloenk.de>,
	Adam Bratschi-Kaye <ark.email@gmail.com>,
	Wedson Almeida Filho <wedsonaf@google.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Sven Van Asbroeck <thesven73@gmail.com>,
	Gary Guo <gary@garyguo.net>,
	Boris-Chengbiao Zhou <bobo1239@web.de>,
	Boqun Feng <boqun.feng@gmail.com>,
	Douglas Su <d0u9.su@outlook.com>,
	Dariusz Sosnowski <dsosnowski@dsosnowski.pl>,
	Antonio Terceiro <antonio.terceiro@linaro.org>,
	Daniel Xu <dxu@dxuuu.xyz>, Miguel Cano <macanroj@gmail.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	linux-kbuild@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org
Subject: Re: [PATCH v4 16/20] Kbuild: add Rust support
Date: Sat, 12 Feb 2022 14:16:50 +0000	[thread overview]
Message-ID: <YgfBUhYdLXA46kOX@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220212130410.6901-17-ojeda@kernel.org>

On Sat, Feb 12, 2022 at 02:03:42PM +0100, Miguel Ojeda wrote:
> +config RUST
> +	bool "Rust support"
> +	depends on RUST_IS_AVAILABLE
> +	depends on ARM64 || CPU_32v6 || CPU_32v6K || (PPC64 && CPU_LITTLE_ENDIAN) || X86_64 || RISCV

Please don't use CPU_32v6* here.

It probably makes more sense to add a symbol "HAVE_RUST" and have the
appropriate architecture Kconfig files select HAVE_RUST.

Does Rust support Thumb on ARMv6 and ARMv7 architectures?

> +	depends on !MODVERSIONS
> +	depends on !GCC_PLUGIN_RANDSTRUCT
> +	select CONSTRUCTORS
> +	default n

Please remove every utterance of "default n" from your patch; n is the
default default which default defaults to, so you don't need to specify
default n to make the option default to n. It will default to n purely
because n is the default when no default is specified.

> +	help
> +	  Enables Rust support in the kernel.
> +
> +	  This allows other Rust-related options, like drivers written in Rust,
> +	  to be selected.

As Rust doesn't support all the architectures that the kernel supports,
Rust must not be used for core infrastructure.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2022-02-12 14:17 UTC|newest]

Thread overview: 81+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-12 13:03 [PATCH v4 00/20] Rust support Miguel Ojeda
2022-02-12 13:03 ` Miguel Ojeda
2022-02-12 13:03 ` Miguel Ojeda
2022-02-12 13:03 ` Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 01/20] kallsyms: support "big" kernel symbols Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 02/20] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2022-02-22  8:19   ` Petr Mladek
2022-02-22 12:45     ` Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 03/20] kallsyms: use the correct buffer size for symbols Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 04/20] rust: add C helpers Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 05/20] rust: add `compiler_builtins` crate Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 06/20] rust: add `alloc` crate Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 07/20] rust: add `build_error` crate Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 08/20] rust: add `macros` crate Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 09/20] rust: add `kernel` crate's `sync` module Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 10/20] rust: add `kernel` crate Miguel Ojeda
2022-02-14  5:27   ` Sergey Senozhatsky
2022-02-14 13:36     ` Miguel Ojeda
2022-02-22  9:06   ` Petr Mladek
2022-02-22 12:48     ` Miguel Ojeda
2022-02-24 12:39       ` Petr Mladek
2022-02-12 13:03 ` [PATCH v4 11/20] rust: export generated symbols Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 12/20] vsprintf: add new `%pA` format specifier Miguel Ojeda
2022-02-14 10:18   ` Andy Shevchenko
2022-02-14 10:52     ` Rasmus Villemoes
2022-02-14 11:36       ` David Laight
2022-02-14 14:04         ` Miguel Ojeda
2022-02-14 12:12       ` Miguel Ojeda
2022-02-22  9:29         ` Petr Mladek
2022-02-22 10:35           ` Rasmus Villemoes
2022-02-24  9:55             ` Petr Mladek
2022-02-14 12:27     ` Miguel Ojeda
2022-02-14 13:54       ` Andy Shevchenko
2022-02-14 14:56         ` Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 13/20] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 14/20] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 15/20] docs: add Rust documentation Miguel Ojeda
2022-02-14 10:47   ` Akira Yokosawa
2022-02-14 12:44     ` Miguel Ojeda
2022-02-16 13:37     ` Akira Yokosawa
2022-02-16 14:02       ` Miguel Ojeda
2022-03-17  8:19     ` Miguel Ojeda
2022-03-17 14:50       ` Akira Yokosawa
2022-03-18 13:12         ` Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 16/20] Kbuild: add Rust support Miguel Ojeda
2022-02-12 13:03   ` Miguel Ojeda
2022-02-12 13:03   ` Miguel Ojeda
2022-02-12 13:03   ` Miguel Ojeda
2022-02-12 14:16   ` Russell King (Oracle) [this message]
2022-02-12 14:16     ` Russell King (Oracle)
2022-02-12 14:16     ` Russell King (Oracle)
2022-02-12 14:16     ` Russell King (Oracle)
2022-02-12 15:47     ` Miguel Ojeda
2022-02-12 15:47       ` Miguel Ojeda
2022-02-12 15:47       ` Miguel Ojeda
2022-02-12 15:47       ` Miguel Ojeda
2022-02-12 16:18       ` Russell King (Oracle)
2022-02-12 16:18         ` Russell King (Oracle)
2022-02-12 16:18         ` Russell King (Oracle)
2022-02-12 16:18         ` Russell King (Oracle)
2022-02-12 18:32         ` Miguel Ojeda
2022-02-12 18:32           ` Miguel Ojeda
2022-02-12 18:32           ` Miguel Ojeda
2022-02-12 18:32           ` Miguel Ojeda
2022-02-12 18:27   ` John Paul Adrian Glaubitz
2022-02-12 18:27     ` John Paul Adrian Glaubitz
2022-02-12 18:27     ` John Paul Adrian Glaubitz
2022-02-12 18:27     ` John Paul Adrian Glaubitz
2022-02-12 18:57     ` Miguel Ojeda
2022-02-12 18:57       ` Miguel Ojeda
2022-02-12 18:57       ` Miguel Ojeda
2022-02-12 18:57       ` Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 17/20] samples: add Rust examples Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 18/20] MAINTAINERS: Rust Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 19/20] [RFC] drivers: gpio: PrimeCell PL061 in Rust Miguel Ojeda
2022-02-12 13:03 ` [PATCH v4 20/20] [RFC] drivers: android: Binder IPC " Miguel Ojeda
2022-02-13  9:31 ` [PATCH v4 00/20] Rust support, nn/nn Geert Stappers
2022-02-13  9:55   ` Greg KH
2022-02-13 10:52     ` Geert Stappers
2022-02-14 14:16       ` Miguel Ojeda
2022-02-14 14:48         ` Geert Stappers

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