Patch "libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h" has been added to the 4.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     libfdt-define-int32_max-and-uint32_max-in-libfdt_env.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit aa248108df607ed82bd71353d0c59767b344bc71
Author: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Date:   Wed Nov 13 16:12:02 2019 +0900

    libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h
    
    [ Upstream commit a8de1304b7df30e3a14f2a8b9709bb4ff31a0385 ]
    
    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@xxxxxxxxxxxxx>
    Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/arm/boot/compressed/libfdt_env.h b/arch/arm/boot/compressed/libfdt_env.h
index 005bf4ff1b4c..f3ddd4f599e3 100644
--- a/arch/arm/boot/compressed/libfdt_env.h
+++ b/arch/arm/boot/compressed/libfdt_env.h
@@ -1,11 +1,13 @@
 #ifndef _ARM_LIBFDT_ENV_H
 #define _ARM_LIBFDT_ENV_H
 
+#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 0b3db6322c79..5f2cb1c53e15 100644
--- a/arch/powerpc/boot/libfdt_env.h
+++ b/arch/powerpc/boot/libfdt_env.h
@@ -5,6 +5,8 @@
 #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 8850e243c940..bd0a55821177 100644
--- a/include/linux/libfdt_env.h
+++ b/include/linux/libfdt_env.h
@@ -6,6 +6,9 @@
 
 #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;