xfs: push q_qlock acquisition from xchk_dquot_iter to the callers.

There is no good reason to take q_qlock in xchk_dquot_iter, which just
provides a reference to the dquot.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

Author: Christoph Hellwig

fs/xfs/scrub/dqiterate.c

@@ -205,7 +205,6 @@ xchk_dquot_iter(
 	if (error)
 		return error;
 
-	mutex_lock(&dq->q_qlock);
 	cursor->id = dq->q_id + 1;
 	*dqpp = dq;
 	return 1;

fs/xfs/scrub/quota.c

@@ -329,6 +329,7 @@ xchk_quota(
 	/* Now look for things that the quota verifiers won't complain about. */
 	xchk_dqiter_init(&cursor, sc, dqtype);
 	while ((error = xchk_dquot_iter(&cursor, &dq)) == 1) {
+		mutex_lock(&dq->q_qlock);
 		error = xchk_quota_item(&sqi, dq);
 		mutex_unlock(&dq->q_qlock);
 		xfs_qm_dqrele(dq);

fs/xfs/scrub/quota_repair.c

@@ -512,6 +512,7 @@ xrep_quota_problems(
 
 	xchk_dqiter_init(&cursor, sc, dqtype);
 	while ((error = xchk_dquot_iter(&cursor, &dq)) == 1) {
+		mutex_lock(&dq->q_qlock);
 		error = xrep_quota_item(&rqi, dq);
 		mutex_unlock(&dq->q_qlock);
 		xfs_qm_dqrele(dq);

fs/xfs/scrub/quotacheck.c

@@ -675,6 +675,7 @@ xqcheck_compare_dqtype(
 	/* Compare what we observed against the actual dquots. */
 	xchk_dqiter_init(&cursor, sc, dqtype);
 	while ((error = xchk_dquot_iter(&cursor, &dq)) == 1) {
+		mutex_lock(&dq->q_qlock);
 		error = xqcheck_compare_dquot(xqc, dqtype, dq);
 		mutex_unlock(&dq->q_qlock);
 		xfs_qm_dqrele(dq);

fs/xfs/scrub/quotacheck_repair.c

@@ -155,6 +155,7 @@ xqcheck_commit_dqtype(
 	 */
 	xchk_dqiter_init(&cursor, sc, dqtype);
 	while ((error = xchk_dquot_iter(&cursor, &dq)) == 1) {
+		mutex_lock(&dq->q_qlock);
 		error = xqcheck_commit_dquot(xqc, dqtype, dq);
 		mutex_unlock(&dq->q_qlock);
 		xfs_qm_dqrele(dq);