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;
