From: NeilBrown <neilb@suse.com>
To: Jeff Layton <jlayton@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
Martin Wilck <mwilck@suse.de>,
linux-fsdevel@vger.kernel.org,
Frank Filz <ffilzlnx@mindspring.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 6/9] fs/locks: change all *_conflict() functions to return bool.
Date: Wed, 24 Oct 2018 09:43:54 +1100 [thread overview]
Message-ID: <154033463456.29542.7420053940945101783.stgit@noble> (raw)
In-Reply-To: <154033435272.29542.13985568983074440924.stgit@noble>
posix_locks_conflict() and flock_locks_conflict() both return int.
leases_conflict() returns bool.
This inconsistency will cause problems for the next patch if not
fixed.
So change posix_locks_conflict() and flock_locks_conflict() to return
bool.
Also change the locks_conflict() helper.
And convert some
return (foo);
to
return foo;
Signed-off-by: NeilBrown <neilb@suse.com>
---
fs/locks.c | 27 +++++++++++++++------------
1 file changed, 15 insertions(+), 12 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index e2ad0a7986c5..1e2a122c9673 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -791,47 +791,50 @@ locks_delete_lock_ctx(struct file_lock *fl, struct list_head *dispose)
/* Determine if lock sys_fl blocks lock caller_fl. Common functionality
* checks for shared/exclusive status of overlapping locks.
*/
-static int locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl)
+static bool locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
{
if (sys_fl->fl_type == F_WRLCK)
- return 1;
+ return true;
if (caller_fl->fl_type == F_WRLCK)
- return 1;
- return 0;
+ return true;
+ return false;
}
/* Determine if lock sys_fl blocks lock caller_fl. POSIX specific
* checking before calling the locks_conflict().
*/
-static int posix_locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl)
+static bool posix_locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
{
/* POSIX locks owned by the same process do not conflict with
* each other.
*/
if (posix_same_owner(caller_fl, sys_fl))
- return (0);
+ return false;
/* Check whether they overlap */
if (!locks_overlap(caller_fl, sys_fl))
- return 0;
+ return false;
- return (locks_conflict(caller_fl, sys_fl));
+ return locks_conflict(caller_fl, sys_fl);
}
/* Determine if lock sys_fl blocks lock caller_fl. FLOCK specific
* checking before calling the locks_conflict().
*/
-static int flock_locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl)
+static bool flock_locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
{
/* FLOCK locks referring to the same filp do not conflict with
* each other.
*/
if (caller_fl->fl_file == sys_fl->fl_file)
- return (0);
+ return false;
if ((caller_fl->fl_type & LOCK_MAND) || (sys_fl->fl_type & LOCK_MAND))
- return 0;
+ return false;
- return (locks_conflict(caller_fl, sys_fl));
+ return locks_conflict(caller_fl, sys_fl);
}
void
next prev parent reply other threads:[~2018-10-23 22:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-23 22:43 [PATCH 0/9 v3] locks: avoid thundering-herd wake-ups NeilBrown
2018-10-23 22:43 ` [PATCH 8/9] locks: merge posix_unblock_lock() and locks_delete_block() NeilBrown
2018-10-23 22:43 ` NeilBrown [this message]
2018-10-23 22:43 ` [PATCH 3/9] NFS: use locks_copy_lock() to copy locks NeilBrown
2018-10-23 22:43 ` [PATCH 2/9] fs/locks: split out __locks_wake_up_blocks() NeilBrown
2018-10-23 22:43 ` [PATCH 9/9] VFS: locks: remove unnecessary white space NeilBrown
2018-10-23 22:43 ` [PATCH 7/9] fs/locks: create a tree of dependent requests NeilBrown
2018-10-23 22:43 ` [PATCH 1/9] fs/locks: rename some lists and pointers NeilBrown
2018-10-23 22:43 ` [PATCH 4/9] fs/locks: allow a lock request to block other requests NeilBrown
2018-10-23 22:43 ` [PATCH 5/9] fs/locks: always delete_block after waiting NeilBrown
2018-10-25 16:04 ` [PATCH 0/9 v3] locks: avoid thundering-herd wake-ups J. Bruce Fields
2018-10-25 19:27 ` Martin Wilck
2018-10-26 13:46 ` Jeff Layton
2018-10-28 22:43 ` NeilBrown
2018-10-29 1:56 ` NeilBrown
2018-10-29 12:38 ` Jeff Layton
2018-10-30 12:04 ` Jeff Layton
2018-10-30 17:56 ` Jeff Layton
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