linux-kernel - [PATCH v15 11/23] dma-resv: Add kref_put_dma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230827175449.1766701-12-dmitry.osipenko@collabora.com>
Date:   Sun, 27 Aug 2023 20:54:37 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     David Airlie <airlied@...il.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Christian König <christian.koenig@....com>,
        Qiang Yu <yuq825@...il.com>,
        Steven Price <steven.price@....com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Emma Anholt <emma@...olt.net>, Melissa Wen <mwen@...lia.com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Mark Rutland <mark.rutland@....com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com, virtualization@...ts.linux-foundation.org,
        intel-gfx@...ts.freedesktop.org
Subject: [PATCH v15 11/23] dma-resv: Add kref_put_dma_resv()

Add simple kref_put_dma_resv() helper that wraps around kref_put_ww_mutex()
for drivers that needs to lock dma-resv on kref_put().

It's not possible to easily add this helper to kref.h because of the
headers inclusion dependency, hence add it to dma-resv.h.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
---
 include/linux/dma-resv.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h
index 8d0e34dad446..c5cf302e4194 100644
--- a/include/linux/dma-resv.h
+++ b/include/linux/dma-resv.h
@@ -41,6 +41,7 @@
 
 #include <linux/ww_mutex.h>
 #include <linux/dma-fence.h>
+#include <linux/kref.h>
 #include <linux/slab.h>
 #include <linux/seqlock.h>
 #include <linux/rcupdate.h>
@@ -464,6 +465,14 @@ static inline void dma_resv_unlock(struct dma_resv *obj)
 	ww_mutex_unlock(&obj->lock);
 }
 
+static inline int kref_put_dma_resv(struct kref *kref,
+				    void (*release)(struct kref *kref),
+				    struct dma_resv *resv,
+				    struct ww_acquire_ctx *ctx)
+{
+	return kref_put_ww_mutex(kref, release, &resv->lock, ctx);
+}
+
 void dma_resv_init(struct dma_resv *obj);
 void dma_resv_fini(struct dma_resv *obj);
 int dma_resv_reserve_fences(struct dma_resv *obj, unsigned int num_fences);
-- 
2.41.0