[PATCH 09/12] fs/locks: change all *_conflict() functions to return bool.

[NeilBrown]

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 <ne...@suse.com>
---
 fs/locks.c |   27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/fs/locks.c b/fs/locks.c
index 8d9d79e7a565..74b24191d6e6 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -795,47 +795,50 @@ 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