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[RFC,4/8] mm: ioremap: allow ARCH to have its own ioremap definition

Message ID b70d1dee4f0cf0b414cd8cfa7fe7010cc2a9b80f.1665568707.git.christophe.leroy@csgroup.eu (mailing list archive)
State New
Headers show
Series mm: ioremap: Convert architectures to take GENERIC_IOREMAP way (Alternative) | expand

Commit Message

Christophe Leroy Oct. 12, 2022, 10:09 a.m. UTC 
From: Baoquan He <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, 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>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 include/asm-generic/io.h | 3 +++
 1 file changed, 3 insertions(+)
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Patch

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