diff mbox series

[v4,04/16] mm: ioremap: allow ARCH to have its own ioremap method definition

Message ID 20230216123419.461016-5-bhe@redhat.com
State New
Headers
Series mm: ioremap: Convert architectures to take GENERIC_IOREMAP way |

Commit Message

Baoquan He Feb. 16, 2023, 12:34 p.m. UTC 
  Architectures can be converted to GENERIC_IOREMAP, to take standard
ioremap_xxx() and iounmap() way. But some ARCH-es could have specific
handling for ioremap_prot(), ioremap() and iounmap(), than standard
methods.

In oder to convert these ARCH-es to take GENERIC_IOREMAP, allow these
architecutres to have their own ioremap_prot(), ioremap() and iounmap()
definitions.

Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: linux-arch@vger.kernel.org
---
 include/asm-generic/io.h | 3 +++
 mm/ioremap.c             | 4 ++++
 2 files changed, 7 insertions(+)

Comments

Arnd Bergmann Feb. 16, 2023, 12:41 p.m. UTC | #1 
On Thu, Feb 16, 2023, at 13:34, Baoquan He wrote:
> Architectures can be converted to GENERIC_IOREMAP, to take standard
> ioremap_xxx() and iounmap() way. But some ARCH-es could have specific
> handling for ioremap_prot(), ioremap() and iounmap(), than standard
> methods.
>
> In oder to convert these ARCH-es to take GENERIC_IOREMAP, allow these
> architecutres to have their own ioremap_prot(), ioremap() and iounmap()
> definitions.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
> Cc: linux-arch@vger.kernel.org

Acked-by: Arnd Bergmann <arnd@arndb.de>
diff mbox series

Patch

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 5a9cf16ee0c2..29ee791164ac 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
diff --git a/mm/ioremap.c b/mm/ioremap.c
index db6234b9db59..9f34a8f90b58 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -46,12 +46,14 @@  void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
 	return (void __iomem *)(vaddr + offset);
 }
 
+#ifndef ioremap_prot
 void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
 			   unsigned long prot)
 {
 	return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
 }
 EXPORT_SYMBOL(ioremap_prot);
+#endif
 
 void generic_iounmap(volatile void __iomem *addr)
 {
@@ -64,8 +66,10 @@  void generic_iounmap(volatile void __iomem *addr)
 		vunmap(vaddr);
 }
 
+#ifndef iounmap
 void iounmap(volatile void __iomem *addr)
 {
 	generic_iounmap(addr);
 }
 EXPORT_SYMBOL(iounmap);
+#endif