Re: [PATCH v10 14/27] vsprintf: add new `%pA` format specifier

[Greg Kroah-Hartman]

On Tue, Sep 27, 2022 at 03:14:45PM +0200, Miguel Ojeda wrote:
> From: Gary Guo <gary@xxxxxxxxxxx>
> 
> 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.
> 
> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
> Acked-by: Petr Mladek <pmladek@xxxxxxxx>
> Co-developed-by: Alex Gaynor <alex.gaynor@xxxxxxxxx>
> Signed-off-by: Alex Gaynor <alex.gaynor@xxxxxxxxx>
> Co-developed-by: Wedson Almeida Filho <wedsonaf@xxxxxxxxxx>
> Signed-off-by: Wedson Almeida Filho <wedsonaf@xxxxxxxxxx>
> Signed-off-by: Gary Guo <gary@xxxxxxxxxxx>
> Co-developed-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
> Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
> ---
>  Documentation/core-api/printk-formats.rst | 10 ++++++++++
>  lib/vsprintf.c                            | 13 +++++++++++++
>  2 files changed, 23 insertions(+)

Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>