ARM: mm: kill unused runtime hook arch_iounmap()

Since the following commits,

v5.4
  commit 59d3ae9a5bf6 ("ARM: remove Intel iop33x and iop13xx support")
v5.11
  commit 3e3f354bc383 ("ARM: remove ebsa110 platform")

The runtime hook arch_iounmap() on ARM is useless, kill arch_iounmap()
and __iounmap().

Cc: Russell King <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
Signed-off-by: Kefeng Wang <[email protected]>
Reviewed-by: Russell King (Oracle) <[email protected]>
Reported-by: kernel test robot <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>

1 files changed, 1 insertions, 8 deletions

diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 2658f52903da..c42debaded95 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -230,14 +230,7 @@ void *arch_memremap_wb(phys_addr_t phys_addr, size_t size)
 	return (void *)phys_addr;
 }
 
-void __iounmap(volatile void __iomem *addr)
-{
-}
-EXPORT_SYMBOL(__iounmap);
-
-void (*arch_iounmap)(volatile void __iomem *);
-
-void iounmap(volatile void __iomem *addr)
+void iounmap(volatile void __iomem *io_addr)
 {
 }
 EXPORT_SYMBOL(iounmap);