linux-mtd.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: Sascha Hauer <s.hauer@pengutronix.de>
To: linux-fsdevel@vger.kernel.org
Cc: Richard Weinberger <richard@nod.at>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	linux-mtd@lists.infradead.org, kernel@pengutronix.de,
	Jan Kara <jack@suse.com>
Subject: [PATCH 03/11] fs: move __get_super() out of loop
Date: Wed, 14 Aug 2019 14:18:26 +0200	[thread overview]
Message-ID: <20190814121834.13983-4-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20190814121834.13983-1-s.hauer@pengutronix.de>

__get_super_thawed() calls __get_super() multiple times. I can't see a case
where __get_super() would return another valid superblock when called
again, so move the call to __get_super() out of the loop. This is done in
preparation for the next patch.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 fs/super.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index 5960578a4076..f85d1ea194ae 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -786,17 +786,26 @@ EXPORT_SYMBOL(get_super);
 static struct super_block *__get_super_thawed(struct block_device *bdev,
 					      bool excl)
 {
+	struct super_block *s = __get_super(bdev, excl);
+	if (!s)
+		return NULL;
+
 	while (1) {
-		struct super_block *s = __get_super(bdev, excl);
-		if (!s || s->s_writers.frozen == SB_UNFROZEN)
+		if (s->s_writers.frozen == SB_UNFROZEN)
 			return s;
+
 		if (!excl)
 			up_read(&s->s_umount);
 		else
 			up_write(&s->s_umount);
+
 		wait_event(s->s_writers.wait_unfrozen,
 			   s->s_writers.frozen == SB_UNFROZEN);
-		put_super(s);
+
+		if (!excl)
+			down_read(&sb->s_umount);
+		else
+			down_write(&sb->s_umount);
 	}
 }
 
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

  parent reply	other threads:[~2019-08-14 12:19 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14 12:18 [PATCH 00/11] Add quota support to UBIFS Sascha Hauer
2019-08-14 12:18 ` [PATCH 01/11] quota: Make inode optional Sascha Hauer
2019-08-14 12:18 ` [PATCH 02/11] quota: Only module_put the format when existing Sascha Hauer
2019-08-15 11:18   ` Jan Kara
2019-08-16 11:49     ` Sascha Hauer
2019-08-14 12:18 ` Sascha Hauer [this message]
2019-08-14 23:32   ` [PATCH 03/11] fs: move __get_super() out of loop Al Viro
2019-08-14 12:18 ` [PATCH 04/11] fs, quota: introduce wait_super_thawed() to wait until a superblock is thawed Sascha Hauer
2019-08-14 23:35   ` Al Viro
2019-08-14 12:18 ` [PATCH 05/11] quota: Allow to pass quotactl a mountpoint Sascha Hauer
2019-08-14 22:42   ` kbuild test robot
2019-08-14 23:33   ` kbuild test robot
2019-08-14 23:36   ` Al Viro
2019-08-14 23:39     ` Al Viro
2019-08-14 23:51       ` Al Viro
2019-08-15  9:53         ` Jan Kara
2019-08-15  7:46       ` Sascha Hauer
2019-08-14 12:18 ` [PATCH 06/11] ubifs: move checks and preparation into setflags() Sascha Hauer
2019-08-14 12:18 ` [PATCH 07/11] ubifs: Add support for FS_IOC_FS[SG]ETXATTR ioctls Sascha Hauer
2019-08-14 14:11   ` Mainz, Roland
2019-08-15  7:31     ` Sascha Hauer
2019-08-14 12:18 ` [PATCH 08/11] ubifs: do not ubifs_inode() on potentially NULL pointer Sascha Hauer
2019-08-14 12:18 ` [PATCH 09/11] ubifs: Add support for project id Sascha Hauer
2019-08-14 12:18 ` [PATCH 10/11] ubifs: export get_znode Sascha Hauer
2019-08-14 12:18 ` [PATCH 11/11] ubifs: Add quota support Sascha Hauer
2019-08-15 11:17   ` Jan Kara

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190814121834.13983-4-s.hauer@pengutronix.de \
    --to=s.hauer@pengutronix.de \
    --cc=jack@suse.com \
    --cc=kernel@pengutronix.de \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-mtd@lists.infradead.org \
    --cc=richard@nod.at \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).