linux-kernel - Re: [PATCH v3] libfdt: define INT32_MAX and UINT32_MAX in libfdt

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Date:   Tue, 26 Nov 2019 13:34:42 -0700
From:   Rob Herring <robh@...nel.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     devicetree@...r.kernel.org, Frank Rowand <frowand.list@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] libfdt: define INT32_MAX and UINT32_MAX in
 libfdt_env.h

On Wed, Nov 13, 2019 at 04:12:02PM +0900, Masahiro Yamada wrote:
> The DTC v1.5.1 added references to (U)INT32_MAX.
> 
> This is no problem for user-space programs since <stdint.h> defines
> (U)INT32_MAX along with (u)int32_t.
> 
> For the kernel space, libfdt_env.h needs to be adjusted before we
> pull in the changes.
> 
> In the kernel, we usually use s/u32 instead of (u)int32_t for the
> fixed-width types.
> 
> Accordingly, we already have S/U32_MAX for their max values.
> So, we should not add (U)INT32_MAX to <linux/limits.h> any more.
> 
> Instead, add them to the in-kernel libfdt_env.h to compile the
> latest libfdt.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
> 
> My initial plan was to change this in a series of 3 patches
> since it is clean, and reduces the code.
> 
> [1/3] https://lore.kernel.org/patchwork/patch/1147095/
> [2/3] https://lore.kernel.org/patchwork/patch/1147096/
> [3/3] https://lore.kernel.org/patchwork/patch/1147097/
> 
> 1/3 is stuck in the license bikeshed.
> 
> For 2/3, I have not been able to get Ack from Russell.
> 
> So, I chose a straight-forward fixup.
> 
> 
> Changes in v3:
>  - Resend as a single patch
> 
>  arch/arm/boot/compressed/libfdt_env.h | 4 +++-
>  arch/powerpc/boot/libfdt_env.h        | 2 ++
>  include/linux/libfdt_env.h            | 3 +++
>  3 files changed, 8 insertions(+), 1 deletion(-)

Applied.

Rob