SELinux: pass a superblock to security_fs_use

Rather than passing pointers to memory locations, strings, and other
stuff just give up on the separation and give security_fs_use the
superblock.  It just makes the code easier to read (even if not easier to
reuse on some other OS)

Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 1a73fcd..01a0382 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -171,8 +171,7 @@
 #define SECURITY_FS_USE_NONE		5 /* no labeling support */
 #define SECURITY_FS_USE_MNTPOINT	6 /* use mountpoint labeling */
 
-int security_fs_use(const char *fstype, short unsigned int *behavior,
-	u32 *sid);
+int security_fs_use(struct super_block *sb);
 
 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 	u32 *sid);