From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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,
Gary Guo <gary@garyguo.net>, Alex Gaynor <alex.gaynor@gmail.com>,
Wedson Almeida Filho <wedsonaf@google.com>,
Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>
Subject: Re: [PATCH v5 12/20] vsprintf: add new `%pA` format specifier
Date: Fri, 18 Mar 2022 16:07:31 +0200 [thread overview]
Message-ID: <YjSSI4cmGblm+6j7@smile.fi.intel.com> (raw)
In-Reply-To: <20220317181032.15436-13-ojeda@kernel.org>
On Thu, Mar 17, 2022 at 07:10:00PM +0100, Miguel Ojeda wrote:
> From: Gary Guo <gary@garyguo.net>
>
> This patch adds a format specifier `%pA` to `vsprintf` which formats
> a pointer as `core::fmt::Arguments`. Doing so allows us to directly
> format to the internal buffer of `printf`, so we do not have to use
> a temporary buffer on the stack to pre-assemble the message on
> the Rust side.
>
> This specifier is intended only to be used from Rust and not for C, so
> `checkpatch.pl` is intentionally unchanged to catch any misuse.
...
> + case 'A':
> + if (!IS_ENABLED(CONFIG_RUST)) {
> + WARN_ONCE(1, "Please remove %%pA from non-Rust code\n");
> + return error_string(buf, end, "(%pA?)", spec);
> + }
I'm wondering if the Big Scary Banner as trace_printk() does would be better
(in case we can tell that %pA is used in the code when RUST=n).
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2022-03-18 14:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-17 18:09 [PATCH v5 00/20] Rust support Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 01/20] kallsyms: support "big" kernel symbols Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 02/20] kallsyms: increase maximum kernel symbol length to 512 Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 03/20] kallsyms: use the correct buffer size for symbols Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 04/20] rust: add C helpers Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 05/20] rust: add `compiler_builtins` crate Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 06/20] rust: add `alloc` crate Miguel Ojeda
2022-03-31 12:42 ` Greg Kroah-Hartman
2022-03-31 13:19 ` Miguel Ojeda
2022-03-31 13:35 ` Greg Kroah-Hartman
2022-03-17 18:09 ` [PATCH v5 07/20] rust: add `build_error` crate Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 08/20] rust: add `macros` crate Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 09/20] rust: add `kernel` crate's `sync` module Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 10/20] rust: add `kernel` crate Miguel Ojeda
2022-03-17 18:09 ` [PATCH v5 11/20] rust: export generated symbols Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 12/20] vsprintf: add new `%pA` format specifier Miguel Ojeda
2022-03-18 14:07 ` Andy Shevchenko [this message]
2022-03-18 16:04 ` Petr Mladek
2022-03-22 4:16 ` Sergey Senozhatsky
2022-03-17 18:10 ` [PATCH v5 13/20] scripts: add `generate_rust_analyzer.py` Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 14/20] scripts: decode_stacktrace: demangle Rust symbols Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 15/20] docs: add Rust documentation Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 16/20] Kbuild: add Rust support Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 17/20] samples: add Rust examples Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 18/20] MAINTAINERS: Rust Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 19/20] [RFC] drivers: gpio: PrimeCell PL061 in Rust Miguel Ojeda
2022-03-17 18:10 ` [PATCH v5 20/20] [RFC] drivers: android: Binder IPC " Miguel Ojeda
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