io: declare __cpu_is_be in generic code
To use the swap byte transformations in big endian architectures,
we need to declare __cpu_is_be in the generic code.
Let's move it from the ppc code to the generic code.
Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20211118145406.340503-1-pmorel@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/lib/asm-generic/io.h b/lib/asm-generic/io.h
index 88972f3..dc0f46f 100644
--- a/lib/asm-generic/io.h
+++ b/lib/asm-generic/io.h
@@ -13,6 +13,14 @@
#include "asm/page.h"
#include "asm/barrier.h"
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define __cpu_is_be() (0)
+#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define __cpu_is_be() (1)
+#else
+#error Undefined byte order
+#endif
+
#ifndef __raw_readb
static inline u8 __raw_readb(const volatile void *addr)
{
@@ -100,10 +108,6 @@
}
#endif
-#ifndef __cpu_is_be
-#define __cpu_is_be() (0)
-#endif
-
#define le16_to_cpu(x) \
({ u16 __r = __cpu_is_be() ? __bswap16(x) : ((u16)x); __r; })
#define cpu_to_le16 le16_to_cpu
diff --git a/lib/ppc64/asm/io.h b/lib/ppc64/asm/io.h
index 2b4dd2b..08d7297 100644
--- a/lib/ppc64/asm/io.h
+++ b/lib/ppc64/asm/io.h
@@ -1,14 +1,6 @@
#ifndef _ASMPPC64_IO_H_
#define _ASMPPC64_IO_H_
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#define __cpu_is_be() (0)
-#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#define __cpu_is_be() (1)
-#else
-#error Undefined byte order
-#endif
-
#define __iomem
#include <asm-generic/io.h>
