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-rw-r--r--fs/ntfs/ntfs.h35
1 files changed, 32 insertions, 3 deletions
diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
index 0624c8ef4d9..bf7b3d7c093 100644
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -60,13 +60,13 @@ extern struct kmem_cache *ntfs_index_ctx_cache;
extern struct address_space_operations ntfs_aops;
extern struct address_space_operations ntfs_mst_aops;
-extern struct file_operations ntfs_file_ops;
+extern const struct file_operations ntfs_file_ops;
extern struct inode_operations ntfs_file_inode_ops;
-extern struct file_operations ntfs_dir_ops;
+extern const struct file_operations ntfs_dir_ops;
extern struct inode_operations ntfs_dir_inode_ops;
-extern struct file_operations ntfs_empty_file_ops;
+extern const struct file_operations ntfs_empty_file_ops;
extern struct inode_operations ntfs_empty_inode_ops;
extern struct export_operations ntfs_export_ops;
@@ -132,4 +132,33 @@ extern int ntfs_ucstonls(const ntfs_volume *vol, const ntfschar *ins,
/* From fs/ntfs/upcase.c */
extern ntfschar *generate_default_upcase(void);
+static inline int ntfs_ffs(int x)
+{
+ int r = 1;
+
+ if (!x)
+ return 0;
+ if (!(x & 0xffff)) {
+ x >>= 16;
+ r += 16;
+ }
+ if (!(x & 0xff)) {
+ x >>= 8;
+ r += 8;
+ }
+ if (!(x & 0xf)) {
+ x >>= 4;
+ r += 4;
+ }
+ if (!(x & 3)) {
+ x >>= 2;
+ r += 2;
+ }
+ if (!(x & 1)) {
+ x >>= 1;
+ r += 1;
+ }
+ return r;
+}
+
#endif /* _LINUX_NTFS_H */