Re: [PATCH 4/4] tools include: Fix include path for uapi/asm-generic/mman.h

From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: David Carrillo-Cisneros <davidcc@google.com>
Cc: linux-kernel@vger.kernel.org, "Ingo Molnar" <mingo@redhat.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Jiri Olsa" <jolsa@kernel.org>,
	"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
	"Wang Nan" <wangnan0@huawei.com>, "He Kuang" <hekuang@huawei.com>,
	"Michal Marek" <mmarek@suse.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Stephane Eranian" <eranian@google.com>,
	"Paul Turner" <pjt@google.com>
Subject: Re: [PATCH 4/4] tools include: Fix include path for uapi/asm-generic/mman.h
Date: Mon, 6 Feb 2017 15:25:23 -0300	[thread overview]
Message-ID: <20170206182523.GB24988@kernel.org> (raw)
In-Reply-To: <20170202063804.94027-5-davidcc@google.com>

Em Wed, Feb 01, 2017 at 10:38:04PM -0800, David Carrillo-Cisneros escreveu:
> commit f3539c12d819 ("tools include: Add uapi mman.h for each architecture")
> 
> copied include/uapi/linux/mman.h into tools/include/uapi/linux/mman.h
> but did not update the include path for uapi/asm-generic/mman.h. Fix it.

What problem is this fixing?

I.e. one is supposed to include <linux/mman.h>, get the
tools/include/uapi/linux/mman.h and it in turn will include the per-arch
mman.h, say tools/arch/sparc/include/uapi/asm/mman.h, that in turn will
include uapi/asm-generic/mman-common.h after defining its diverging
bits.

Some, like the ones for the Alpha and MIPS architectures, will not even
include mman-common.h, so diverging they are.

Lots of arches, like s390, will just include uapi/asm-generic/mman.h
from its mman.h file (tools/arch/s390/include/uapi/asm/mman.h), just
like you'd do for _all_ arches in your patch below.

tools/perf/Makefile.config is the one doing:

INC_FLAGS += -I$(srctree)/tools/arch/$(ARCH)/include/

and:

[acme@jouet linux]$ ls tools/arch/*/include/uapi/asm/mman.h
tools/arch/alpha/include/uapi/asm/mman.h    tools/arch/ia64/include/uapi/asm/mman.h        tools/arch/s390/include/uapi/asm/mman.h
tools/arch/arc/include/uapi/asm/mman.h      tools/arch/m32r/include/uapi/asm/mman.h        tools/arch/score/include/uapi/asm/mman.h
tools/arch/arm64/include/uapi/asm/mman.h    tools/arch/microblaze/include/uapi/asm/mman.h  tools/arch/sh/include/uapi/asm/mman.h
tools/arch/arm/include/uapi/asm/mman.h      tools/arch/mips/include/uapi/asm/mman.h        tools/arch/sparc/include/uapi/asm/mman.h
tools/arch/frv/include/uapi/asm/mman.h      tools/arch/mn10300/include/uapi/asm/mman.h     tools/arch/tile/include/uapi/asm/mman.h
tools/arch/h8300/include/uapi/asm/mman.h    tools/arch/parisc/include/uapi/asm/mman.h      tools/arch/x86/include/uapi/asm/mman.h
tools/arch/hexagon/include/uapi/asm/mman.h  tools/arch/powerpc/include/uapi/asm/mman.h     tools/arch/xtensa/include/uapi/asm/mman.h
[acme@jouet linux]$

Am I missing something?

- Arnaldo

> Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
> ---
>  tools/include/uapi/linux/mman.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/include/uapi/linux/mman.h b/tools/include/uapi/linux/mman.h
> index 81d8edf11789..74a19ae15cd1 100644
> --- a/tools/include/uapi/linux/mman.h
> +++ b/tools/include/uapi/linux/mman.h
> @@ -1,7 +1,7 @@
>  #ifndef _UAPI_LINUX_MMAN_H
>  #define _UAPI_LINUX_MMAN_H
>  
> -#include <uapi/asm/mman.h>
> +#include <uapi/asm-generic/mman.h>
>  
>  #define MREMAP_MAYMOVE	1
>  #define MREMAP_FIXED	2
> -- 
> 2.11.0.483.g087da7b7c-goog