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Subject[PATCH] cris: add ioremap_nocache declaration before include asm-generic/io.h.
A future commit for the nds32 architecture bootstrap("asm-generic/io.h:
move ioremap_nocache/ioremap_uc/ioremap_wc/ioremap_wt out of ifndef
CONFIG_MMU") will move the ioremap_nocache out of the CONFIG_MMU ifdef.
This means that in order to suppress re-definition errors we need to
setup #define's before importing asm-generic/io.h.

Signed-off-by: Greentime Hu <>
arch/cris/include/asm/io.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/cris/include/asm/io.h b/arch/cris/include/asm/io.h
index c92712d30f54..3867db75c314 100644
--- a/arch/cris/include/asm/io.h
+++ b/arch/cris/include/asm/io.h
@@ -20,6 +20,7 @@ static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
extern void iounmap(volatile void * __iomem addr);

extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
+#define ioremap_nocache ioremap_nocache

#include <asm-generic/io.h>

I am picking up the patch in the nds32 tree that caused the regression.
Subject: [linux-next:master 3188/3885] include/asm-generic/io.h:864:15: error: conflicting types for 'ioremap'
tree: master
head: eced78aae9cba83072d5335fbc9b2282a9270469
commit: b3ada9d0ce8d286c8bbbb02fdbddec5036242b42 [3188/3885] asm-generic/io.h: move ioremap_nocache/ioremap_uc/ioremap_wc/ioremap_wt out of ifndef CONFIG_MMU
config: cris-etrax-100lx_v2_defconfig (attached as .config)
compiler: cris-linux-gcc (GCC) 7.2.0
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout b3ada9d0ce8d286c8bbbb02fdbddec5036242b42
# save the attached .config to linux build tree
make.cross ARCH=cris
All errors (new ones prefixed by >>):

In file included from arch/cris/include/asm/io.h:24:0,
from include/linux/io.h:25,
from include/linux/irq.h:25,
from include/asm-generic/hardirq.h:13,
from ./arch/cris/include/generated/asm/hardirq.h:1,
from include/linux/hardirq.h:9,
from include/linux/trace_events.h:9,
from include/trace/syscall.h:7,
from include/linux/syscalls.h:82,
from init/main.c:20:
>> include/asm-generic/io.h:864:15: error: conflicting types for 'ioremap'
void __iomem *ioremap(phys_addr_t phys_addr, size_t size);
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