1 files changed, 133 insertions, 0 deletions

diff --git a/fs/ufs/swab.h b/fs/ufs/swab.h
new file mode 100644
index 000000000000..1683d2bee614
--- /dev/null
+++ b/fs/ufs/swab.h
@@ -0,0 +1,133 @@
+/*
+ *  linux/fs/ufs/swab.h
+ *
+ * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org>
+ * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz>
+ * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org>
+ */
+
+#ifndef _UFS_SWAB_H
+#define _UFS_SWAB_H
+
+/*
+ * Notes:
+ *    HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
+ *    in case there are ufs implementations that have strange bytesexes,
+ *    you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
+ *    to support them.
+ */
+
+enum {
+        BYTESEX_LE,
+        BYTESEX_BE
+};
+
+static inline u64
+fs64_to_cpu(struct super_block *sbp, __fs64 n)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return le64_to_cpu((__force __le64)n);
+        else
+                return be64_to_cpu((__force __be64)n);
+}
+
+static inline __fs64
+cpu_to_fs64(struct super_block *sbp, u64 n)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return (__force __fs64)cpu_to_le64(n);
+        else
+                return (__force __fs64)cpu_to_be64(n);
+}
+
+static __inline u32
+fs64_add(struct super_block *sbp, u32 *n, int d)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return *n = cpu_to_le64(le64_to_cpu(*n)+d);
+        else
+                return *n = cpu_to_be64(be64_to_cpu(*n)+d);
+}
+
+static __inline u32
+fs64_sub(struct super_block *sbp, u32 *n, int d)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return *n = cpu_to_le64(le64_to_cpu(*n)-d);
+        else
+                return *n = cpu_to_be64(be64_to_cpu(*n)-d);
+}
+
+static __inline u32
+fs32_to_cpu(struct super_block *sbp, __fs32 n)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return le32_to_cpu((__force __le32)n);
+        else
+                return be32_to_cpu((__force __be32)n);
+}
+
+static inline __fs32
+cpu_to_fs32(struct super_block *sbp, u32 n)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return (__force __fs32)cpu_to_le32(n);
+        else
+                return (__force __fs32)cpu_to_be32(n);
+}
+
+static inline void
+fs32_add(struct super_block *sbp, __fs32 *n, int d)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                *(__le32 *)n = cpu_to_le32(le32_to_cpu(*(__le32 *)n)+d);
+        else
+                *(__be32 *)n = cpu_to_be32(be32_to_cpu(*(__be32 *)n)+d);
+}
+
+static inline void
+fs32_sub(struct super_block *sbp, __fs32 *n, int d)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                *(__le32 *)n = cpu_to_le32(le32_to_cpu(*(__le32 *)n)-d);
+        else
+                *(__be32 *)n = cpu_to_be32(be32_to_cpu(*(__be32 *)n)-d);
+}
+
+static inline u16
+fs16_to_cpu(struct super_block *sbp, __fs16 n)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return le16_to_cpu((__force __le16)n);
+        else
+                return be16_to_cpu((__force __be16)n);
+}
+
+static inline __fs16
+cpu_to_fs16(struct super_block *sbp, u16 n)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                return (__force __fs16)cpu_to_le16(n);
+        else
+                return (__force __fs16)cpu_to_be16(n);
+}
+
+static inline void
+fs16_add(struct super_block *sbp, __fs16 *n, int d)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                *(__le16 *)n = cpu_to_le16(le16_to_cpu(*(__le16 *)n)+d);
+        else
+                *(__be16 *)n = cpu_to_be16(be16_to_cpu(*(__be16 *)n)+d);
+}
+
+static inline void
+fs16_sub(struct super_block *sbp, __fs16 *n, int d)
+{
+        if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+                *(__le16 *)n = cpu_to_le16(le16_to_cpu(*(__le16 *)n)-d);
+        else
+                *(__be16 *)n = cpu_to_be16(be16_to_cpu(*(__be16 *)n)-d);
+}
+
+#endif /* _UFS_SWAB_H */