centos man page for deactivate_super

DEACTIVATE_SUPER(9)						   The Linux VFS					       DEACTIVATE_SUPER(9)

NAME
       deactivate_super - drop an active reference to superblock

SYNOPSIS
       void deactivate_super(struct super_block * s);

ARGUMENTS
       s
	   superblock to deactivate

DESCRIPTION
       Variant of deactivate_locked_super, except that superblock is *not* locked by caller. If we are going to drop the final active reference,
       lock will be acquired prior to that.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       DEACTIVATE_SUPER(9)