linux-hardening - Re: [PATCH] lib/string: shrink lib/string.i via IWYU

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Message-ID: <ZW-epz8hZGJLWHcB@smile.fi.intel.com>
Date: Wed, 6 Dec 2023 00:05:27 +0200
From: Andy Shevchenko <andy@...nel.org>
To: tanzirh@...gle.com, Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Kees Cook <keescook@...omium.org>, linux-hardening@...r.kernel.org,
	linux-kernel@...r.kernel.org, Nick DeSaulniers <nnn@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>, llvm@...ts.linux.dev
Subject: Re: [PATCH] lib/string: shrink lib/string.i via IWYU

+Cc: Jonathan, who tried IWYU with kernel a year or so ago.

On Tue, Dec 05, 2023 at 08:58:53PM +0000, tanzirh@...gle.com wrote:
> This diff uses an open source tool include-what-you-use (IWYU) to modify
> the include list changing indirect includes to direct includes.
> IWYU is implemented using the IWYUScripts github repository which is a tool that is
> currently undergoing development. These changes seek to improve build times.
> 
> This change to lib/string.c resulted in a preprocessed size of
> lib/string.i from 26371 lines to 5232 lines (-80%).
> 
> If there are any problems with the output of the tool please raise an
> issue on the github.
> 
> Link: https://github.com/ClangBuiltLinux/IWYUScripts
> 
> Signed-off-by: Tanzir Hasan <tanzirh@...gle.com>
> ---
> 
> ---
>  lib/string.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/lib/string.c b/lib/string.c
> index be26623953d2..aff066e9da9f 100644
> --- a/lib/string.c
> +++ b/lib/string.c
> @@ -16,16 +16,16 @@
>  
>  #define __NO_FORTIFY
>  #include <linux/types.h>
> +#include <asm/bitsperlong.h>
> +#include <asm/bug.h>
> +#include <asm/errno.h>
> +#include <asm/rwonce.h>
> +#include <linux/linkage.h>
> +#include <linux/stddef.h>
> +#include <vdso/limits.h>
>  #include <linux/string.h>
>  #include <linux/ctype.h>
> -#include <linux/kernel.h>
> -#include <linux/export.h>
> -#include <linux/bug.h>
> -#include <linux/errno.h>
> -#include <linux/slab.h>
> -
>  #include <asm/unaligned.h>
> -#include <asm/byteorder.h>
>  #include <asm/word-at-a-time.h>
>  #include <asm/page.h>
>  

-- 
With Best Regards,
Andy Shevchenko