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-rw-r--r--fs/cifs/cifsfs.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 9570a0e8023f..586df24c9abb 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -24,6 +24,19 @@
#define ROOT_I 2
+/*
+ * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
+ * so that it will fit.
+ */
+static inline ino_t
+cifs_uniqueid_to_ino_t(u64 fileid)
+{
+ ino_t ino = (ino_t) fileid;
+ if (sizeof(ino_t) < sizeof(u64))
+ ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
+ return ino;
+}
+
extern struct file_system_type cifs_fs_type;
extern const struct address_space_operations cifs_addr_ops;
extern const struct address_space_operations cifs_addr_ops_smallbuf;