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

From: Christophe Leroy
Date: Wed Oct 12 2022 - 06:12:53 EST

From: Baoquan He <bhe@xxxxxxxxxx>

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()

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@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
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);

#ifndef ioremap_wc