[PATCH] fcntl(F_SETSIG) fix

fcntl(F_SETSIG) no longer works on leases because
lease_release_private_callback() gets called as the lease is copied in
order to initialise it.

The problem is that lease_alloc() performs an unnecessary initialisation,
which sets the lease_manager_ops.  Avoid the problem by allocating the
target lease structure using locks_alloc_lock().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/locks.c b/fs/locks.c
index b0b41a64e10b..d7c53392cac1 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1421,8 +1421,9 @@ static int __setlease(struct file *filp, long arg, struct file_lock **flp)
         if (!leases_enable)
                 goto out;
 
-        error = lease_alloc(filp, arg, &fl);
-        if (error)
+        error = -ENOMEM;
+        fl = locks_alloc_lock();
+        if (fl == NULL)
                 goto out;
 
         locks_copy_lock(fl, lease);
@@ -1430,6 +1431,7 @@ static int __setlease(struct file *filp, long arg, struct file_lock **flp)
         locks_insert_lock(before, fl);
 
         *flp = fl;
+        error = 0;
 out:
         return error;
 }