From: Erez Zadok <ezk@cs.sunysb.edu>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
viro@ftp.linux.org.uk, hch@infradead.org,
Erez Zadok <ezk@cs.sunysb.edu>
Subject: [PATCH 14/30] Unionfs: remove unnecessary conditional inode lock
Date: Fri, 28 Dec 2007 15:42:48 -0500 [thread overview]
Message-ID: <11988745922794-git-send-email-ezk@cs.sunysb.edu> (raw)
In-Reply-To: <11988745841003-git-send-email-ezk@cs.sunysb.edu>
This was intended to protect the inode during branch management, but that is
now done through our superblock rwsem.
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---
fs/unionfs/dentry.c | 13 -------------
1 files changed, 0 insertions(+), 13 deletions(-)
diff --git a/fs/unionfs/dentry.c b/fs/unionfs/dentry.c
index 68c07ba..dc1aa39 100644
--- a/fs/unionfs/dentry.c
+++ b/fs/unionfs/dentry.c
@@ -33,7 +33,6 @@ static bool __unionfs_d_revalidate_one(struct dentry *dentry,
int bindex, bstart, bend;
int sbgen, dgen;
int positive = 0;
- int locked = 0;
int interpose_flag;
struct nameidata lowernd; /* TODO: be gentler to the stack */
@@ -87,16 +86,6 @@ static bool __unionfs_d_revalidate_one(struct dentry *dentry,
interpose_flag = INTERPOSE_REVAL_NEG;
if (positive) {
interpose_flag = INTERPOSE_REVAL;
- /*
- * During BRM, the VFS could already hold a lock on
- * a file being read, so don't lock it again
- * (deadlock), but if you lock it in this function,
- * then release it here too.
- */
- if (!mutex_is_locked(&dentry->d_inode->i_mutex)) {
- mutex_lock(&dentry->d_inode->i_mutex);
- locked = 1;
- }
bstart = ibstart(dentry->d_inode);
bend = ibend(dentry->d_inode);
@@ -115,8 +104,6 @@ static bool __unionfs_d_revalidate_one(struct dentry *dentry,
UNIONFS_I(dentry->d_inode)->lower_inodes = NULL;
ibstart(dentry->d_inode) = -1;
ibend(dentry->d_inode) = -1;
- if (locked)
- mutex_unlock(&dentry->d_inode->i_mutex);
}
result = unionfs_lookup_backend(dentry, &lowernd,
--
1.5.2.2
next prev parent reply other threads:[~2007-12-28 20:52 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-28 20:42 [GIT PULL -mm] 00/30 Unionfs+fsstack updates/fixes/cleanups Erez Zadok
2007-12-28 20:42 ` [PATCH 01/30] VFS/fs_stack: drop cast on inode passed to i_size_read Erez Zadok
2007-12-28 20:42 ` [PATCH 02/30] VFS/fs_stack: use locking around i_size_write in 32-bit systems Erez Zadok
2007-12-28 20:42 ` [PATCH 03/30] Unionfs: " Erez Zadok
2007-12-28 20:42 ` [PATCH 04/30] Unionfs: clarify usage.txt read/write behavior Erez Zadok
2007-12-28 20:42 ` [PATCH 05/30] Unionfs: interpose cleanup and fix for spliced dentries Erez Zadok
2007-12-28 20:42 ` [PATCH 06/30] Unionfs: initialize inode times for reused inodes Erez Zadok
2007-12-28 20:42 ` [PATCH 07/30] Unionfs: create new special files only in first branch Erez Zadok
2007-12-28 20:42 ` [PATCH 08/30] Unionfs: create new symlinks " Erez Zadok
2007-12-28 20:42 ` [PATCH 09/30] Unionfs: release special files on copyup Erez Zadok
2007-12-28 20:42 ` [PATCH 10/30] Unionfs: mmap fixes Erez Zadok
2007-12-28 20:42 ` [PATCH 11/30] Unionfs: restructure unionfs_setattr and fix truncation order Erez Zadok
2007-12-28 20:42 ` [PATCH 12/30] Unionfs: remove custom read/write methods Erez Zadok
2007-12-28 20:42 ` [PATCH 13/30] Unionfs: prevent deadlock in cache coherency Erez Zadok
2007-12-28 20:42 ` Erez Zadok [this message]
2007-12-28 20:42 ` [PATCH 15/30] Unionfs: remove unnecessary lock when deleting whiteouts Erez Zadok
2007-12-28 20:42 ` [PATCH 16/30] Unionfs: remove unnecessary lock in read_inode Erez Zadok
2007-12-28 20:42 ` [PATCH 17/30] Unionfs: remove unnecessary locking in follow-link Erez Zadok
2007-12-28 20:42 ` [PATCH 18/30] Unionfs: remove unnecessary parent lock in create Erez Zadok
2007-12-28 20:42 ` [PATCH 19/30] Unionfs: prevent false lockdep warnings in stacking Erez Zadok
2007-12-28 20:42 ` [PATCH 20/30] Unionfs: implement lockdep classes Erez Zadok
2007-12-28 20:42 ` [PATCH 21/30] Unionfs: minor code rearrangement in rename Erez Zadok
2007-12-28 20:42 ` [PATCH 22/30] Unionfs: handle on lower inodes in lookup Erez Zadok
2007-12-28 20:42 ` [PATCH 23/30] Unionfs: set our superblock a/m/ctime granularity Erez Zadok
2007-12-28 20:42 ` [PATCH 24/30] Unionfs: update inode times after a successful open Erez Zadok
2007-12-28 20:42 ` [PATCH 25/30] Unionfs: minor cleanup in check_empty Erez Zadok
2007-12-28 20:43 ` [PATCH 26/30] Unionfs: initialize namelist variable in rename Erez Zadok
2007-12-28 20:43 ` [PATCH 27/30] Unionfs: cleanup lower inodes after successful unlink Erez Zadok
2007-12-28 20:43 ` [PATCH 28/30] Unionfs: don't check dentry on error Erez Zadok
2007-12-28 20:43 ` [PATCH 29/30] Unionfs: implement d_iput method Erez Zadok
2007-12-28 20:43 ` [PATCH 30/30] Unionfs: don't check parent dentries Erez Zadok
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