kernfs: s/sysfs/kernfs/ in global variables

kernfs has just been separated out from sysfs and we're already in
full conflict mode.  Nothing can make the situation any worse.  Let's
take the chance to name things properly.

This patch performs the following renames.

* s/sysfs_mutex/kernfs_mutex/
* s/sysfs_dentry_ops/kernfs_dops/
* s/sysfs_dir_operations/kernfs_dir_fops/
* s/sysfs_dir_inode_operations/kernfs_dir_iops/
* s/kernfs_file_operations/kernfs_file_fops/ - renamed for consistency
* s/sysfs_symlink_inode_operations/kernfs_symlink_iops/
* s/sysfs_aops/kernfs_aops/
* s/sysfs_backing_dev_info/kernfs_bdi/
* s/sysfs_inode_operations/kernfs_iops/
* s/sysfs_dir_cachep/kernfs_node_cache/
* s/sysfs_ops/kernfs_sops/

This patch is strictly rename only and doesn't introduce any
functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index c4bf5bf..e62e8ec 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -71,7 +71,7 @@
 };
 #define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
 
-extern struct kmem_cache *sysfs_dir_cachep;
+extern struct kmem_cache *kernfs_node_cache;
 
 /*
  * inode.c
@@ -93,10 +93,10 @@
 /*
  * dir.c
  */
-extern struct mutex sysfs_mutex;
-extern const struct dentry_operations sysfs_dentry_ops;
-extern const struct file_operations sysfs_dir_operations;
-extern const struct inode_operations sysfs_dir_inode_operations;
+extern struct mutex kernfs_mutex;
+extern const struct dentry_operations kernfs_dops;
+extern const struct file_operations kernfs_dir_fops;
+extern const struct inode_operations kernfs_dir_iops;
 
 struct kernfs_node *sysfs_get_active(struct kernfs_node *kn);
 void sysfs_put_active(struct kernfs_node *kn);
@@ -110,13 +110,13 @@
 /*
  * file.c
  */
-extern const struct file_operations kernfs_file_operations;
+extern const struct file_operations kernfs_file_fops;
 
 void sysfs_unmap_bin_file(struct kernfs_node *kn);
 
 /*
  * symlink.c
  */
-extern const struct inode_operations sysfs_symlink_inode_operations;
+extern const struct inode_operations kernfs_symlink_iops;
 
 #endif	/* __KERNFS_INTERNAL_H */