From: "J. Bruce Fields" <bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Al Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
Cc: linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
"J. Bruce Fields"
<bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: [PATCH 02/12] vfs: don't use PARENT/CHILD lock classes for non-directories
Date: Tue, 16 Apr 2013 21:46:14 -0400 [thread overview]
Message-ID: <1366163185-10317-3-git-send-email-bfields@redhat.com> (raw)
In-Reply-To: <1366163185-10317-1-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
From: "J. Bruce Fields" <bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Reserve I_MUTEX_PARENT and I_MUTEX_CHILD for locking of actual
directories.
(Also I_MUTEX_QUOTA isn't really a meaningful name for this locking
class any more; fixed in a later patch.)
Signed-off-by: J. Bruce Fields <bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
fs/inode.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/inode.c b/fs/inode.c
index 9815712..07af7be 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -987,11 +987,11 @@ EXPORT_SYMBOL(unlock_new_inode);
void lock_two_nondirectories(struct inode *inode1, struct inode *inode2)
{
if (inode1 < inode2) {
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
+ mutex_lock(&inode1->i_mutex);
+ mutex_lock_nested(&inode2->i_mutex, I_MUTEX_QUOTA);
} else {
- mutex_lock_nested(&inode2->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_CHILD);
+ mutex_lock(&inode2->i_mutex);
+ mutex_lock_nested(&inode1->i_mutex, I_MUTEX_QUOTA);
}
}
EXPORT_SYMBOL(lock_two_nondirectories);
--
1.7.9.5
--
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next prev parent reply other threads:[~2013-04-17 1:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-17 1:46 [PATCH 00/12] Implement NFSv4 delegations, take 7 J. Bruce Fields
2013-04-17 1:46 ` [PATCH 01/12] vfs: pull ext4's double-i_mutex-locking into common code J. Bruce Fields
2013-04-17 1:46 ` [PATCH 03/12] vfs: rename I_MUTEX_QUOTA now that it's not used for quotas J. Bruce Fields
2013-04-17 1:46 ` [PATCH 05/12] locks: introduce new FL_DELEG lock flag J. Bruce Fields
2013-04-17 1:46 ` [PATCH 06/12] locks: implement delegations J. Bruce Fields
2013-04-17 1:46 ` [PATCH 08/12] locks: break delegations on unlink J. Bruce Fields
2013-04-17 1:46 ` [PATCH 09/12] locks: helper functions for delegation breaking J. Bruce Fields
[not found] ` <1366163185-10317-1-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-04-17 1:46 ` J. Bruce Fields [this message]
2013-04-17 1:46 ` [PATCH 04/12] vfs: take i_mutex on renamed file J. Bruce Fields
2013-04-17 1:46 ` [PATCH 07/12] namei: minor vfs_unlink cleanup J. Bruce Fields
2013-04-17 1:46 ` [PATCH 10/12] locks: break delegations on rename J. Bruce Fields
2013-04-17 1:46 ` [PATCH 11/12] locks: break delegations on link J. Bruce Fields
2013-04-17 1:46 ` [PATCH 12/12] locks: break delegations on any attribute modification J. Bruce Fields
-- strict thread matches above, loose matches on Subject: below --
2013-09-05 16:30 [PATCH 00/12] Implement NFSv4 delegations, take 10 J. Bruce Fields
2013-09-05 16:30 ` [PATCH 02/12] vfs: don't use PARENT/CHILD lock classes for non-directories J. Bruce Fields
2013-07-03 20:12 [PATCH 00/12] Implement NFSv4 delegations, take 8 J. Bruce Fields
2013-07-03 20:12 ` [PATCH 02/12] vfs: don't use PARENT/CHILD lock classes for non-directories J. Bruce Fields
[not found] ` <1372882356-14168-3-git-send-email-bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-07-09 10:50 ` Jeff Layton
2013-02-03 16:31 [PATCH 00/12] Implement NFSv4 delegations, take 6 J. Bruce Fields
2013-02-03 16:31 ` [PATCH 02/12] vfs: don't use PARENT/CHILD lock classes for non-directories J. Bruce Fields
2012-10-16 22:01 [PATCH 00/12] Implement NFSv4 delegations, take 5 J. Bruce Fields
2012-10-16 22:01 ` [PATCH 02/12] vfs: don't use PARENT/CHILD lock classes for non-directories J. Bruce Fields
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