From: Christoph Hellwig <hch@infradead.org>
Date: Mon, 20 Feb 2012 02:28:18 +0000 (+0000)
Subject: quota: make Q_XQUOTASYNC a noop
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4b217ed9e30f94b6e8e5e262020ef0ceab6113af;p=linux-beck.git

quota: make Q_XQUOTASYNC a noop

Now that XFS takes quota reservations into account there is no need to flush
anything before reporting quotas - in addition to beeing fully transactional
all quota information is also 100% coherent with the rest of the filesystem
now.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
---

diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index 7898cd688a00..7a9bedeb1d57 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -282,10 +282,9 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
 	case Q_XGETQUOTA:
 		return quota_getxquota(sb, type, id, addr);
 	case Q_XQUOTASYNC:
-		/* caller already holds s_umount */
 		if (sb->s_flags & MS_RDONLY)
 			return -EROFS;
-		writeback_inodes_sb(sb, WB_REASON_SYNC);
+		/* XFS quotas are fully coherent now, making this call a noop */
 		return 0;
 	default:
 		return -EINVAL;