commit aa1f4345b5480502a4e61addf5c59d606fdbce8f
Author: Sam Ravnborg <s...@ravnborg.org>
Date: Mon Nov 30 22:09:29 2020 +0100
sh: Fix set but not used warnings with !CONFIG_MMU
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.
v4:
- Fix build error of ethernet driver (kernel test robot)
Added missing () around macro parameter
Signed-off-by: Sam Ravnborg <s...@ravnborg.org>
Cc: kernel test robot <l...@intel.com>
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Lee Jones <lee.jo...@linaro.org>
Cc: Rich Felker <dal...@libc.org>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Geert Uytterhoeven <geert+rene...@glider.be>
Cc: Mike Rapoport <r...@kernel.org>
Cc: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Sam Ravnborg <s...@ravnborg.org>
Cc: Andrew Morton <a...@linux-foundation.org>
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 6d5c6463bc07..45082bcbd9aa 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 */
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