[PATCH 03/11] mm: ioremap: allow ARCH to have its own ioremap definition

From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@infradead.org,
	wangkefeng.wang@huawei.com, linux-arm-kernel@lists.infradead.org,
	Baoquan He <bhe@redhat.com>
Subject: [PATCH 03/11] mm: ioremap: allow ARCH to have its own ioremap definition
Date: Mon,  1 Aug 2022 22:40:21 +0800	[thread overview]
Message-ID: <20220801144029.57829-4-bhe@redhat.com> (raw)
In-Reply-To: <20220801144029.57829-1-bhe@redhat.com>

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, then standard ioremap()
method.

In oder to convert them to take GENERIC_IOREMAP method, allow ARCH
to have its 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 0b5cd3cef99d..444761c3a44b 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -995,11 +995,14 @@ void __iomem *ioremap_prot(phys_addr_t paddr, 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

