Mark UFS as being MP-Safe in "options QUOTA" case too. Remove no more

neccessary Giant acquisions in softdepend processing code.

Tested by:	Peter Holm
Reviewed by:	tegge
Approved by:	re (kensmith)

sys/ufs/ffs/ffs_softdep.c

@@ -722,16 +722,12 @@ softdep_flush(void)
 	struct ufsmount *ump;
 	struct thread *td;
 	int remaining;
-	int vfslocked;
 
 	td = curthread;
 	td->td_pflags |= TDP_NORUNNINGBUF;
 
 	for (;;) {	
 		kthread_suspend_check(softdepproc);
-#ifdef QUOTA
-		mtx_lock(&Giant);
-#endif
 		ACQUIRE_LOCK(&lk);
 		/*
 		 * If requested, try removing inode or removal dependencies.
@@ -747,9 +743,6 @@ softdep_flush(void)
 			wakeup_one(&proc_waiting);
 		}
 		FREE_LOCK(&lk);
-#ifdef QUOTA
-		mtx_unlock(&Giant);
-#endif
 		remaining = 0;
 		mtx_lock(&mountlist_mtx);
 		for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp)  {
@@ -758,12 +751,10 @@ softdep_flush(void)
 				continue;
 			if (vfs_busy(mp, LK_NOWAIT, &mountlist_mtx, td))
 				continue;
-			vfslocked = VFS_LOCK_GIANT(mp);
 			softdep_process_worklist(mp, 0);
 			ump = VFSTOUFS(mp);
 			remaining += ump->softdep_on_worklist -
 				ump->softdep_on_worklist_inprogress;
-			VFS_UNLOCK_GIANT(vfslocked);
 			mtx_lock(&mountlist_mtx);
 			nmp = TAILQ_NEXT(mp, mnt_list);
 			vfs_unbusy(mp, td);

sys/ufs/ffs/ffs_vfsops.c

@@ -880,19 +880,9 @@ ffs_mountfs(devvp, mp, td)
 	(void) ufs_extattr_autostart(mp, td);
 #endif /* !UFS_EXTATTR_AUTOSTART */
 #endif /* !UFS_EXTATTR */
-#ifdef QUOTA
-	/*
-	 * Our bufobj must require giant for snapshots when quotas are
-	 * enabled.
-	 */
-	BO_LOCK(&devvp->v_bufobj);
-	devvp->v_bufobj.bo_flag |= BO_NEEDSGIANT;
-	BO_UNLOCK(&devvp->v_bufobj);
-#else
 	MNT_ILOCK(mp);
 	mp->mnt_kern_flag |= MNTK_MPSAFE;
 	MNT_IUNLOCK(mp);
-#endif
 	return (0);
 out:
 	if (bp)