linux-kernel - Re: limits.h in tools/

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Date: Tue, 23 Apr 2024 22:29:31 +0300
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, Willy Tarreau <w@....eu>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	Andrew Morton <akpm@...ux-foundation.org>, willy@...radead.org,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: limits.h in tools/

On Tue, Apr 23, 2024 at 04:22:01PM -0300, Arnaldo Carvalho de Melo wrote:
> On Tue, Apr 23, 2024 at 09:58:07PM +0300, Andy Shevchenko wrote:
> > It seems tons of the code in tools include linux/limits.h. But I haven't found
> > where do we copy it. Any pointers?
> > 
> > Based on the discussion 20220603183231.15159C385A9@...p.kernel.org.
> 
> ⬢[acme@...lbox perf-tools-next]$ diff -u /usr/include/linux/limits.h include/uapi/linux/limits.h 
> --- /usr/include/linux/limits.h	2024-01-31 21:00:00.000000000 -0300
> +++ include/uapi/linux/limits.h	2024-02-03 16:18:02.652000641 -0300
> @@ -1,6 +1,6 @@
>  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> -#ifndef _LINUX_LIMITS_H
> -#define _LINUX_LIMITS_H
> +#ifndef _UAPI_LINUX_LIMITS_H
> +#define _UAPI_LINUX_LIMITS_H
>  
>  #define NR_OPEN	        1024
>  
> ⬢[acme@...lbox perf-tools-next]$
> 
> And in the places where I test build perf I saw no problem so far, the
> build failures below are unrelated, but still outstanding, see below.
> 
> But then is for building tools/, not the kernel, right? The discussion
> you said this question was based on is about changing
> include/linux/xarray.h, a kernel file, so should really be including
> just kernel headers, files in the kernel source tree, outside tools/, I
> don't see where what tools/ uses to build is relevant here? Can you
> please elaborate?

I believe the tool in question is tools/testing/radix-tree/xarray.c.

-- 
With Best Regards,
Andy Shevchenko