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[3/3] libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h

Message ID 20191101061411.16988-4-yamada.masahiro@socionext.com
State New, archived
Headers show
Series libfdt: prepare for (U)INT32_MAX addition | expand

Commit Message

Masahiro Yamada Nov. 1, 2019, 6:14 a.m. UTC
The libfdt in the upstream DTC project added references to (U)INT32_MAX
by the following commits:

  Commit 812b1956a076 ("libfdt: Tweak data handling to satisfy Coverity")
  Commit 7fcf8208b8a9 ("libfdt: add fdt_append_addrrange()")

The kernel needs to adjust libfdt_env.h before pulling in the changes.

As for the user-space programs, <stdint.h> defines (U)INT32_MAX along
with (u)int32_t.

In the kernel, on the other hand, we usually use s32 / u32 instead of
(u)int32_t for the fixed-width types.

Accordingly, we already have S32_MAX / U32_MAX for their max values.
So, we won't add (U)INT32_MAX to <linux/limits.h> any more.

Instead, add them to the in-kernel libfdt_env.h to compile fdt.c and

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

 arch/powerpc/boot/libfdt_env.h | 2 ++
 include/linux/libfdt_env.h     | 3 +++
 2 files changed, 5 insertions(+)
diff mbox series


diff --git a/arch/powerpc/boot/libfdt_env.h b/arch/powerpc/boot/libfdt_env.h
index 2abc8e83b95e..a4a386114ef5 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 INT32_MAX		((u32)~0U)
+#define UINT32_MAX		((s32)(INT_MAX >> 1))
 #include "of.h"
diff --git a/include/linux/libfdt_env.h b/include/linux/libfdt_env.h
index edb0f0c30904..0bd83bdb2482 100644
--- a/include/linux/libfdt_env.h
+++ b/include/linux/libfdt_env.h
@@ -11,6 +11,9 @@  typedef __be16 fdt16_t;
 typedef __be32 fdt32_t;
 typedef __be64 fdt64_t;
+#define INT32_MAX	S32_MAX
+#define UINT32_MAX	U32_MAX
 #define fdt32_to_cpu(x) be32_to_cpu(x)
 #define cpu_to_fdt32(x) cpu_to_be32(x)
 #define fdt64_to_cpu(x) be64_to_cpu(x)