linux-kernel - [PATCH 5.10 054/154] sh: define __BIG

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Date:   Wed, 24 Nov 2021 12:57:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Rich Felker <dalias@...c.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 054/154] sh: define __BIG_ENDIAN for math-emu

From: Randy Dunlap <rdunlap@...radead.org>

[ Upstream commit b929926f01f2d14635345d22eafcf60feed1085e ]

Fix this by defining both ENDIAN macros in
<asm/sfp-machine.h> so that they can be utilized in
<math-emu/soft-fp.h> according to the latter's comment:
/* Allow sfp-machine to have its own byte order definitions. */

(This is what is done in arch/nds32/include/asm/sfp-machine.h.)

This placates these build warnings:

In file included from ../arch/sh/math-emu/math.c:23:
.../include/math-emu/single.h:50:21: warning: "__BIG_ENDIAN" is not defined, evaluates to 0 [-Wundef]
   50 | #if __BYTE_ORDER == __BIG_ENDIAN
In file included from ../arch/sh/math-emu/math.c:24:
.../include/math-emu/double.h:59:21: warning: "__BIG_ENDIAN" is not defined, evaluates to 0 [-Wundef]
   59 | #if __BYTE_ORDER == __BIG_ENDIAN

Fixes: 4b565680d163 ("sh: math-emu support")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
Tested-by: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Signed-off-by: Rich Felker <dalias@...c.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/sh/include/asm/sfp-machine.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/sh/include/asm/sfp-machine.h b/arch/sh/include/asm/sfp-machine.h
index cbc7cf8c97ce6..2d2423478b71d 100644
--- a/arch/sh/include/asm/sfp-machine.h
+++ b/arch/sh/include/asm/sfp-machine.h
@@ -13,6 +13,14 @@
 #ifndef _SFP_MACHINE_H
 #define _SFP_MACHINE_H
 
+#ifdef __BIG_ENDIAN__
+#define __BYTE_ORDER __BIG_ENDIAN
+#define __LITTLE_ENDIAN 0
+#else
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#define __BIG_ENDIAN 0
+#endif
+
 #define _FP_W_TYPE_SIZE		32
 #define _FP_W_TYPE		unsigned long
 #define _FP_WS_TYPE		signed long
-- 
2.33.0