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Message-Id: <b70d1dee4f0cf0b414cd8cfa7fe7010cc2a9b80f.1665568707.git.christophe.leroy@csgroup.eu>
Date: Wed, 12 Oct 2022 12:09:40 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Baoquan He <bhe@...hat.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
akpm@...ux-foundation.org, hch@...radead.org,
agordeev@...ux.ibm.com, wangkefeng.wang@...wei.com,
schnelle@...ux.ibm.com, David.Laight@...LAB.COM, shorne@...il.com,
Arnd Bergmann <arnd@...db.de>
Subject: [RFC PATCH 4/8] mm: ioremap: allow ARCH to have its own ioremap definition
From: Baoquan He <bhe@...hat.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, 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@...hat.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: linux-arch@...r.kernel.org
Cc: Kefeng Wang <wangkefeng.wang@...wei.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 43eb4f62e954..b2ed73708a3e 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -1081,11 +1081,14 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
void iounmap(volatile void __iomem *addr);
void generic_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
--
2.37.1
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