On 11/11/2021 19.48, Pierre Morel wrote:
To use the swap byte transformations we need to declare
the s390x architecture as big endian.
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
lib/s390x/asm/io.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/s390x/asm/io.h b/lib/s390x/asm/io.h
index 1dc6283b..b5e661cf 100644
--- a/lib/s390x/asm/io.h
+++ b/lib/s390x/asm/io.h
@@ -10,6 +10,7 @@
#define _ASMS390X_IO_H_
#define __iomem
+#define __cpu_is_be() (1)
#include <asm-generic/io.h>
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
Alternatively, I think you could also move this sequence from
lib/ppc64/asm/io.h into lib/asm-generic/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
(replacing the hardcoded __cpu_is_be() in the generic code).
Thomas
