blob: c64f5ede3990d8bf83d0b57e88bf58138b32485c [file] [log] [blame]
From 1c40b007326d7b30b7373fefc14f5c3037e812b4 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <>
Date: Wed, 13 Nov 2019 16:12:02 +0900
Subject: [PATCH] libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h
commit a8de1304b7df30e3a14f2a8b9709bb4ff31a0385 upstream.
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 <>
Signed-off-by: Rob Herring <>
Signed-off-by: Paul Gortmaker <>
diff --git a/arch/arm/boot/compressed/libfdt_env.h b/arch/arm/boot/compressed/libfdt_env.h
index b36c0289a308..6a0f1f524466 100644
--- a/arch/arm/boot/compressed/libfdt_env.h
+++ b/arch/arm/boot/compressed/libfdt_env.h
@@ -2,11 +2,13 @@
+#include <linux/limits.h>
#include <linux/types.h>
#include <linux/string.h>
#include <asm/byteorder.h>
-#define INT_MAX ((int)(~0U>>1))
+#define INT32_MAX S32_MAX
+#define UINT32_MAX U32_MAX
typedef __be16 fdt16_t;
typedef __be32 fdt32_t;
diff --git a/arch/powerpc/boot/libfdt_env.h b/arch/powerpc/boot/libfdt_env.h
index 2abc8e83b95e..9757d4f6331e 100644
--- a/arch/powerpc/boot/libfdt_env.h
+++ b/arch/powerpc/boot/libfdt_env.h
@@ -6,6 +6,8 @@
#include <string.h>
#define INT_MAX ((int)(~0U>>1))
+#define UINT32_MAX ((u32)~0U)
+#define INT32_MAX ((s32)(UINT32_MAX >> 1))
#include "of.h"
diff --git a/include/linux/libfdt_env.h b/include/linux/libfdt_env.h
index edb0f0c30904..1adf54aad2df 100644
--- a/include/linux/libfdt_env.h
+++ b/include/linux/libfdt_env.h
@@ -7,6 +7,9 @@
#include <asm/byteorder.h>
+#define INT32_MAX S32_MAX
+#define UINT32_MAX U32_MAX
typedef __be16 fdt16_t;
typedef __be32 fdt32_t;
typedef __be64 fdt64_t;