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From:   Baoquan He <bhe@redhat.com>
To:     linux-kernel@vger.kernel.org
Cc:     linux-mm@kvack.org, akpm@linux-foundation.org, hch@infradead.org,
        agordeev@linux.ibm.com, wangkefeng.wang@huawei.com,
        linux-arm-kernel@lists.infradead.org, Baoquan He <bhe@redhat.com>
Subject: [PATCH v2 03/11] mm: ioremap: allow ARCH to have its own ioremap definition
Date:   Sat, 20 Aug 2022 08:31:17 +0800
Message-Id: <20220820003125.353570-4-bhe@redhat.com>
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References: <20220820003125.353570-1-bhe@redhat.com>
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Architectures like xtensa, arc, can be converted to GENERIC_IOREMAP,
to take standard ioremap_prot() and ioremap_xxx() way. But they have
ARCH specific handling for ioremap() method, than standard ioremap()
method.

In oder to convert them to take GENERIC_IOREMAP method, allow these
architecutres to have their own ioremap definition.

This is a preparation patch, no functionality change.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 include/asm-generic/io.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index fb9bda2be8ed..68a8117b30fa 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -1078,11 +1078,14 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
 			   unsigned long prot);
 void iounmap(volatile void __iomem *addr);
 
+#ifndef ioremap
+#define ioremap ioremap
 static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
 {
 	/* _PAGE_IOREMAP needs to be supplied by the architecture */
 	return ioremap_prot(addr, size, _PAGE_IOREMAP);
 }
+#endif
 #endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */
 
 #ifndef ioremap_wc
-- 
2.34.1