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

[patchbot@xxxxxxx]

commit 9110072b764b5abdddb574ece1da4ffd1b34caf2
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri May 10 20:23:40 2024 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Sat May 11 00:13:43 2024 +0100

    x86/io: Don't cast away constness in read{b..q}()
    
    Addresses various MISRA R11.8 violations.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 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 9b19d2d389..1cb4217cff 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))
--
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