Remove zfs_active_fs_count

This variable was used to ensure that the ZFS module is never
removed while the filesystem is mounted.  Once again the generic
Linux VFS handles this case for us so it can be removed.

diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c
index 58d325f..80cdb21 100644 (file)
--- a/module/zfs/zfs_vfsops.c
+++ b/module/zfs/zfs_vfsops.c
@@ -68,13 +68,6 @@
 #ifdef HAVE_ZPL
 extern int sys_shutdown;
 
-/*
- * We need to keep a count of active fs's.
- * This is necessary to prevent our module
- * from being unloaded after a umount -f
- */
-static uint32_t        zfs_active_fs_count = 0;
-
 static char *noatime_cancel[] = { MNTOPT_ATIME, NULL };
 static char *atime_cancel[] = { MNTOPT_NOATIME, NULL };
 static char *noxattr_cancel[] = { MNTOPT_XATTR, NULL };
@@ -1104,8 +1097,6 @@ out:
        if (error) {
                dmu_objset_disown(zfsvfs->z_os, zfsvfs);
                zfsvfs_free(zfsvfs);
-       } else {
-               atomic_add_32(&zfs_active_fs_count, 1);
        }
 
        return (error);
@@ -1630,8 +1621,6 @@ zfs_freevfs(vfs_t *vfsp)
        zfsvfs_t *zfsvfs = vfsp->vfs_data;
 
        zfsvfs_free(zfsvfs);
-
-       atomic_add_32(&zfs_active_fs_count, -1);
 }
 #endif /* HAVE_ZPL */