[PATCH] x86/io: Don't cast away constness in read{b..q}()

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Addresses various MISRA R11.8 violations.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
CC: consulting@xxxxxxxxxxx <consulting@xxxxxxxxxxx>
---
 xen/arch/x86/include/asm/io.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/include/asm/io.h b/xen/arch/x86/include/asm/io.h
index 9b19d2d389ee..1cb4217cff39 100644
--- a/xen/arch/x86/include/asm/io.h
+++ b/xen/arch/x86/include/asm/io.h
@@ -4,10 +4,10 @@
 #include <xen/vmap.h>
 #include <xen/types.h>
 
-#define readb(x) (*(volatile uint8_t  *)(x))
-#define readw(x) (*(volatile uint16_t *)(x))
-#define readl(x) (*(volatile uint32_t *)(x))
-#define readq(x) (*(volatile uint64_t *)(x))
+#define readb(x) (*(const volatile uint8_t  *)(x))
+#define readw(x) (*(const volatile uint16_t *)(x))
+#define readl(x) (*(const volatile uint32_t *)(x))
+#define readq(x) (*(const volatile uint64_t *)(x))
 #define writeb(d,x) (*(volatile uint8_t  *)(x) = (d))
 #define writew(d,x) (*(volatile uint16_t *)(x) = (d))
 #define writel(d,x) (*(volatile uint32_t *)(x) = (d))

base-commit: b0082b908391b29b7c4dd5e6c389ebd6481926f8
-- 
2.30.2