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-rw-r--r--arch/um/drivers/cow.h39
1 files changed, 32 insertions, 7 deletions
diff --git a/arch/um/drivers/cow.h b/arch/um/drivers/cow.h
index 4fcf3a8..dc36b22 100644
--- a/arch/um/drivers/cow.h
+++ b/arch/um/drivers/cow.h
@@ -3,15 +3,40 @@
#include <asm/types.h>
-#if defined(__BIG_ENDIAN)
-# define ntohll(x) (x)
-# define htonll(x) (x)
-#elif defined(__LITTLE_ENDIAN)
-# define ntohll(x) bswap_64(x)
-# define htonll(x) bswap_64(x)
+#if defined(__KERNEL__)
+
+# include <asm/byteorder.h>
+
+# if defined(__BIG_ENDIAN)
+# define ntohll(x) (x)
+# define htonll(x) (x)
+# elif defined(__LITTLE_ENDIAN)
+# define ntohll(x) be64_to_cpu(x)
+# define htonll(x) cpu_to_be64(x)
+# else
+# error "Could not determine byte order"
+# endif
+
#else
-#error "__BYTE_ORDER not defined"
+/* For the definition of ntohl, htonl and __BYTE_ORDER */
+#include <endian.h>
+#include <netinet/in.h>
+#if defined(__BYTE_ORDER)
+
+# if __BYTE_ORDER == __BIG_ENDIAN
+# define ntohll(x) (x)
+# define htonll(x) (x)
+# elif __BYTE_ORDER == __LITTLE_ENDIAN
+# define ntohll(x) bswap_64(x)
+# define htonll(x) bswap_64(x)
+# else
+# error "Could not determine byte order: __BYTE_ORDER uncorrectly defined"
+# endif
+
+#else /* ! defined(__BYTE_ORDER) */
+# error "Could not determine byte order: __BYTE_ORDER not defined"
#endif
+#endif /* ! defined(__KERNEL__) */
extern int init_cow_file(int fd, char *cow_file, char *backing_file,
int sectorsize, int alignment, int *bitmap_offset_out,
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