[PATCH 5/7] ia64: asm/io.h: Expect immutable pointer in virt_to_phys prototype

[Stanislav Kinsburskii]

From: Stanislav Kinsburskii <stanislav.kinsburskii@xxxxxxxxx>

These helper function - virt_to_phys - doesn't need the address pointer to
be mutable.

In the same time expecting it to be mutable leads to the following build
warning for constant pointers:

  warning: passing argument 1 of ‘virt_to_phys’ discards ‘const’ qualifier from pointer target type

Signed-off-by: Stanislav Kinsburskii <stanislav.kinsburskii@xxxxxxxxx>
CC: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
CC: Helge Deller <deller@xxxxxx>
CC: Arnd Bergmann <arnd@xxxxxxxx>
CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Stanislav Kinsburskii <stanislav.kinsburskii@xxxxxxxxx>
CC: linux-ia64@xxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
---
 arch/ia64/include/asm/io.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index 83a492c8d298..c56ad21ba1e9 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -74,7 +74,7 @@ extern unsigned int num_io_spaces;
  * Change virtual addresses to physical addresses and vv.
  */
 static inline unsigned long
-virt_to_phys (volatile void *address)
+virt_to_phys (const volatile void *address)
 {
 	return (unsigned long) address - PAGE_OFFSET;
 }