ACPI / osl: replace custom implementation of readq / writeq

The readq() and writeq() helpers are available in the
asm-generic/io-64-nonatomic-hi-lo.h and asm-generic/io-64-nonatomic-lo-hi.h
headers. Replace custom implementation by the generic helpers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 3b8963f..64077e8 100644 (file)
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -47,6 +47,7 @@
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
+#include <asm-generic/io-64-nonatomic-lo-hi.h>
 
 #include "internal.h"
 
@@ -947,21 +948,6 @@ acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
 
 EXPORT_SYMBOL(acpi_os_write_port);
 
-#ifdef readq
-static inline u64 read64(const volatile void __iomem *addr)
-{
-       return readq(addr);
-}
-#else
-static inline u64 read64(const volatile void __iomem *addr)
-{
-       u64 l, h;
-       l = readl(addr);
-       h = readl(addr+4);
-       return l | (h << 32);
-}
-#endif
-
 acpi_status
 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
 {
@@ -994,7 +980,7 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
                *(u32 *) value = readl(virt_addr);
                break;
        case 64:
-               *(u64 *) value = read64(virt_addr);
+               *(u64 *) value = readq(virt_addr);
                break;
        default:
                BUG();
@@ -1008,19 +994,6 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
        return AE_OK;
 }
 
-#ifdef writeq
-static inline void write64(u64 val, volatile void __iomem *addr)
-{
-       writeq(val, addr);
-}
-#else
-static inline void write64(u64 val, volatile void __iomem *addr)
-{
-       writel(val, addr);
-       writel(val>>32, addr+4);
-}
-#endif
-
 acpi_status
 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
 {
@@ -1049,7 +1022,7 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
                writel(value, virt_addr);
                break;
        case 64:
-               write64(value, virt_addr);
+               writeq(value, virt_addr);
                break;
        default:
                BUG();