From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752871Ab1LLMnA (ORCPT ); Mon, 12 Dec 2011 07:43:00 -0500 Received: from mail-ey0-f174.google.com ([209.85.215.174]:55177 "EHLO mail-ey0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752606Ab1LLMm7 (ORCPT ); Mon, 12 Dec 2011 07:42:59 -0500 From: Daniel Baluta To: greg@kroah.com, linux-kernel@vger.kernel.org Cc: Daniel Baluta Subject: [PATCH] kref: add function for reading kref value Date: Mon, 12 Dec 2011 14:44:52 +0200 Message-Id: <1323693892-11570-1-git-send-email-dbaluta@ixiacom.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can easily get kref refcount value by accesing kref->refcount but it is better to have a function for this. Signed-off-by: Daniel Baluta --- include/linux/kref.h | 1 + lib/kref.c | 9 +++++++++ 2 files changed, 10 insertions(+), 0 deletions(-) diff --git a/include/linux/kref.h b/include/linux/kref.h index d4a62ab..cd1b04a 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h @@ -22,6 +22,7 @@ struct kref { }; void kref_init(struct kref *kref); +atomic_t kref_read(struct kref *kref); void kref_get(struct kref *kref); int kref_put(struct kref *kref, void (*release) (struct kref *kref)); int kref_sub(struct kref *kref, unsigned int count, diff --git a/lib/kref.c b/lib/kref.c index 3efb882..48aaf2a 100644 --- a/lib/kref.c +++ b/lib/kref.c @@ -25,6 +25,15 @@ void kref_init(struct kref *kref) smp_mb(); } +/** + * kref_read - read refcount for object + * @kref: object. + */ +void kref_read(struct kref *kref) +{ + return atomic_read(&kref->refcount); +} + /** * kref_get - increment refcount for object. * @kref: object. -- 1.7.1