linux-kernel - [PATCH] media: fsl-viu: Use proper check for presence of {out,in}

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Message-Id: <1528451328-21316-1-git-send-email-geert@linux-m68k.org>
Date:   Fri,  8 Jun 2018 11:48:48 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...ts.ozlabs.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] media: fsl-viu: Use proper check for presence of {out,in}_be32()

When compile-testing on m68k or microblaze:

    drivers/media/platform/fsl-viu.c:41:1: warning: "out_be32" redefined
    drivers/media/platform/fsl-viu.c:42:1: warning: "in_be32" redefined

Fix this by replacing the check for PowerPC by checks for the presence
of {out,in}_be32().

As PowerPC implements the be32 accessors using inline functions instead
of macros, identity definions are added for all accessors to make the
above checks work.

Fixes: 29d750686331a1a9 ("media: fsl-viu: allow building it with COMPILE_TEST")
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
Compile-tested on m68k, microblaze, and powerpc.
Assembler output before/after compared for powerpc.
---
 arch/powerpc/include/asm/io.h    | 14 ++++++++++++++
 drivers/media/platform/fsl-viu.c |  4 +++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index e0331e7545685c5f..3741183ae09349f1 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -222,6 +222,20 @@ static inline void out_be64(volatile u64 __iomem *addr, u64 val)
 #endif
 #endif /* __powerpc64__ */
 
+#define in_be16 in_be16
+#define in_be32 in_be32
+#define in_be64 in_be64
+#define in_le16 in_le16
+#define in_le32 in_le32
+#define in_le64 in_le64
+
+#define out_be16 out_be16
+#define out_be32 out_be32
+#define out_be64 out_be64
+#define out_le16 out_le16
+#define out_le32 out_le32
+#define out_le64 out_le64
+
 /*
  * Low level IO stream instructions are defined out of line for now
  */
diff --git a/drivers/media/platform/fsl-viu.c b/drivers/media/platform/fsl-viu.c
index e41510ce69a40815..5d5e030c9c980647 100644
--- a/drivers/media/platform/fsl-viu.c
+++ b/drivers/media/platform/fsl-viu.c
@@ -37,8 +37,10 @@
 #define VIU_VERSION		"0.5.1"
 
 /* Allow building this driver with COMPILE_TEST */
-#ifndef CONFIG_PPC
+#ifndef out_be32
 #define out_be32(v, a)	iowrite32be(a, (void __iomem *)v)
+#endif
+#ifndef in_be32
 #define in_be32(a)	ioread32be((void __iomem *)a)
 #endif
 
-- 
2.7.4