[PATCH 2/7] alpha: asm/io.h: Expect immutable pointer in virt_to_phys/isa_virt_to_bus prototypes

[Stanislav Kinsburskii]

From: Stanislav Kinsburskii <stanislav.kinsburskii@xxxxxxxxx>

These two helper functions - virt_to_phys and isa_virt_to_bus - don'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: Richard Henderson <richard.henderson@xxxxxxxxxx>
CC: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
CC: Matt Turner <mattst88@xxxxxxxxx>
CC: Arnd Bergmann <arnd@xxxxxxxx>
CC: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
CC: Linus Walleij <linus.walleij@xxxxxxxxxx>
CC: Stanislav Kinsburskii <stanislav.kinsburskii@xxxxxxxxx>
CC: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: linux-alpha@xxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
---
 arch/alpha/include/asm/io.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index 7aeaf7c30a6f..0e2016537bd3 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -56,7 +56,7 @@ extern inline void set_hae(unsigned long new_hae)
  * Change virtual addresses to physical addresses and vv.
  */
 #ifdef USE_48_BIT_KSEG
-static inline unsigned long virt_to_phys(volatile void *address)
+static inline unsigned long virt_to_phys(const volatile void *address)
 {
 	return (unsigned long)address - IDENT_ADDR;
 }
@@ -66,7 +66,7 @@ static inline void * phys_to_virt(unsigned long address)
 	return (void *) (address + IDENT_ADDR);
 }
 #else
-static inline unsigned long virt_to_phys(volatile void *address)
+static inline unsigned long virt_to_phys(const volatile void *address)
 {
         unsigned long phys = (unsigned long)address;
 
@@ -104,7 +104,7 @@ static inline void * phys_to_virt(unsigned long address)
 extern unsigned long __direct_map_base;
 extern unsigned long __direct_map_size;
 
-static inline unsigned long __deprecated isa_virt_to_bus(volatile void *address)
+static inline unsigned long __deprecated isa_virt_to_bus(const volatile void *address)
 {
 	unsigned long phys = virt_to_phys(address);
 	unsigned long bus = phys + __direct_map_base;