From: Sam Ravnborg <sam@xxxxxxxxxxxx>
Subject: sh: prevent warnings when using iounmap
When building drm/exynos for sh, as part of an allmodconfig build, the
following warning triggered:
exynos7_drm_decon.c: In function `decon_remove':
exynos7_drm_decon.c:769:24: warning: unused variable `ctx'
struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
The ctx variable is only used as argument to iounmap().
In sh - allmodconfig CONFIG_MMU is not defined
so it ended up in:
\#define __iounmap(addr) do { } while (0)
\#define iounmap __iounmap
Fix the warning by introducing a static inline
function for iounmap.
This is similar to several other architectures.
Link: http://lkml.kernel.org/r/20190622114208.24427-1-sam@xxxxxxxxxxxx
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Inki Dae <inki.dae@xxxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sh/include/asm/io.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/arch/sh/include/asm/io.h~sh-prevent-warnings-when-using-iounmap
+++ a/arch/sh/include/asm/io.h
@@ -369,7 +369,11 @@ static inline int iounmap_fixed(void __i
#define ioremap_nocache ioremap
#define ioremap_uc ioremap
-#define iounmap __iounmap
+
+static inline void iounmap(void __iomem *addr)
+{
+ __iounmap(addr);
+}
/*
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
_
