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b=uPXz+dDMAvSwAXGZh2jpBdnIGjP5/4P1Bi7fU4KjhDdrrUhmuS+1iwLBL5/Ch7nk2 yoSNA9Nqk0pwb6Qm8dTt9S7pGFBR7xRykO/XC8Uiyvhy+ynoAVH44BcG/ZX1xrgjRr f7S5ch72l2xHSj/6lT+whhxF9B5bG6KmjYJAO73Fmp1/WoQ2Hb4aL4bB9D78/irFGp JphMh1g0mUZplgv7y2OWfetRViBhbKCFDEAjIP7BKLkCY6NDnd1IpcspTkDAVZgS2T un44QqqeeEqeR3lnRp4qaCLGlduD6sBnDTc2o9YBKANnMf+gPZLqYcG7UViKXRPDgK quBdiV2/cmkoA== From: Leon Romanovsky To: Alex Williamson Cc: Vivek Kasireddy , Jason Gunthorpe , Andrew Morton , Bjorn Helgaas , =?UTF-8?q?Christian=20K=C3=B6nig?= , Christoph Hellwig , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, Jens Axboe , Joerg Roedel , kvm@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Logan Gunthorpe , Marek Szyprowski , Robin Murphy , Sumit Semwal , Will Deacon Subject: [PATCH v1 07/10] vfio: Export vfio device get and put registration helpers Date: Mon, 4 Aug 2025 16:00:42 +0300 Message-ID: X-Mailer: git-send-email 2.50.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: ezsg81rfjkipjjiy8fftbjpwufhiu1w4 X-Rspamd-Queue-Id: 1B60080017 X-Rspamd-Server: rspam10 X-Rspam-User: X-HE-Tag: 1754312483-964806 X-HE-Meta: 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 M/eeC96i hyXJHRG6OqjgiVQ+8RA9EbOk4L9TLSubRs+RLvCb1PaRguPCJTlfr3UYAJISIG9hUfIAwedeAxBsJmDTCrFR5b1rWjSgvX53R1FMoj0rc5pFlXXpocmgKyNi26wABCBAFmqs+rzcXVkM+s7STjSMgVYFiy8aVSeyKhTgVZ/rwc5Zoi5Bnr1ykNpIg8yJABDlmOZLh6akccIr2DJpApdScoKU6zUW3Xs3rrz0hYrnpRr8osot4DJjLYB/8tsBvTd6vqjgi3lsPvkpMc8uKtlgEQRnNSB0aJB0IDks5 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Vivek Kasireddy These helpers are useful for managing additional references taken on the device from other associated VFIO modules. Original-patch-by: Jason Gunthorpe Signed-off-by: Vivek Kasireddy Signed-off-by: Leon Romanovsky --- drivers/vfio/vfio_main.c | 2 ++ include/linux/vfio.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 1fd261efc582d..620a3ee5d04db 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -171,11 +171,13 @@ void vfio_device_put_registration(struct vfio_device *device) if (refcount_dec_and_test(&device->refcount)) complete(&device->comp); } +EXPORT_SYMBOL_GPL(vfio_device_put_registration); bool vfio_device_try_get_registration(struct vfio_device *device) { return refcount_inc_not_zero(&device->refcount); } +EXPORT_SYMBOL_GPL(vfio_device_try_get_registration); /* * VFIO driver API diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 707b00772ce1f..ba65bbdffd0b2 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -293,6 +293,8 @@ static inline void vfio_put_device(struct vfio_device *device) int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); +bool vfio_device_try_get_registration(struct vfio_device *device); +void vfio_device_put_registration(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set); -- 2.50.1