Building fbdev drivers for sh with W=1 produces the following warning:
tmiofb.c: In function ‘tmiofb_remove’:
tmiofb.c:805:21: warning: variable ‘par’ set but not used
This is with allmodconfig and ARCH=sh
This boiled down to iounmap() defined as empty for !CONFIG_MMU.
Fix this by by adding "(void)addr;" to tell the compiler the
argument to iounmap() should be considered used.
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Lee Jones <lee.jones@xxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sh/include/asm/io.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 6d5c6463bc07..5ad56c6c1e1e 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -271,7 +271,7 @@ static inline void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
#endif /* CONFIG_HAVE_IOREMAP_PROT */
#else /* CONFIG_MMU */
-#define iounmap(addr) do { } while (0)
+#define iounmap(addr) do { (void)addr; } while (0)
#define ioremap(offset, size) ((void __iomem *)(unsigned long)(offset))
#endif /* CONFIG_MMU */
--
2.27.0
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