From 1d1da90042d2ee7a8215dc6291b54bc1ebe59fe4 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Tue, 6 May 2014 19:07:13 +0200
Subject: libtrivfs: lock-less reference counting for trivfs_peropen objects

* libtrivfs/trivfs.h (struct trivfs_peropen): Use refcount_t for field
refcnt.
(struct trivfs_control): Remove unused field lock.
* libtrivfs/cntl-create.c (trivfs_create_control): Drop the mutex
initialization.
* libtrivfs/io-reauthenticate.c (trivfs_S_io_reauthenticate): Adjust
accordingly.
* libtrivfs/io-restrict-auth.c (trivfs_S_io_restrict_auth): Likewise.
* libtrivfs/open.c (trivfs_open): Initialize refcnt.
* libtrivfs/protid-clean.c (trivfs_clean_protid): Likewise.
* libtrivfs/protid-dup.c (trivfs_protid_dup): Likewise.
---
 libtrivfs/protid-dup.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

(limited to 'libtrivfs/protid-dup.c')

diff --git a/libtrivfs/protid-dup.c b/libtrivfs/protid-dup.c
index 61696032..75f3ca88 100644
--- a/libtrivfs/protid-dup.c
+++ b/libtrivfs/protid-dup.c
@@ -35,11 +35,8 @@ trivfs_protid_dup (struct trivfs_protid *cred, struct trivfs_protid **dup)
 
   if (! err)
     {
-      pthread_mutex_lock (&cred->po->cntl->lock);
       new->po = cred->po;
-      new->po->refcnt++;
-      pthread_mutex_unlock (&cred->po->cntl->lock);
-
+      refcount_ref (&new->po->refcnt);
       new->isroot = cred->isroot;
 
       err = iohelp_dup_iouser (&new->user, cred->user);
-- 
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