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Wong" , Randy Dunlap , Jeff Layton , Amir Goldstein , Jonathan Cameron , Stefan Hajnoczi , Joanne Koong , Josef Bacik , Bagas Sanjaya , James Morse , Fuad Tabba , Sean Christopherson , Shivank Garg , Ackerley Tng , Gregory Price , Aravind Ramesh , Ajay Joshi , venkataravis@micron.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH V4 08/19] dax: export dax_dev_get() Date: Wed, 14 Jan 2026 15:31:55 -0600 Message-ID: <20260114213209.29453-9-john@groves.net> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260114213209.29453-1-john@groves.net> References: <20260114153133.29420.compound@groves.net> <20260114213209.29453-1-john@groves.net> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit famfs needs to look up a dax_device by dev_t when resolving fmap entries that reference character dax devices. Signed-off-by: John Groves --- drivers/dax/super.c | 3 ++- include/linux/dax.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 00c330ef437c..d097561d78db 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -513,7 +513,7 @@ static int dax_set(struct inode *inode, void *data) return 0; } -static struct dax_device *dax_dev_get(dev_t devt) +struct dax_device *dax_dev_get(dev_t devt) { struct dax_device *dax_dev; struct inode *inode; @@ -536,6 +536,7 @@ static struct dax_device *dax_dev_get(dev_t devt) return dax_dev; } +EXPORT_SYMBOL_GPL(dax_dev_get); struct dax_device *alloc_dax(void *private, const struct dax_operations *ops) { diff --git a/include/linux/dax.h b/include/linux/dax.h index 6897c5736543..1ef9b03f9671 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -55,6 +55,7 @@ struct dax_device *alloc_dax(void *private, const struct dax_operations *ops); void *dax_holder(struct dax_device *dax_dev); void put_dax(struct dax_device *dax_dev); void kill_dax(struct dax_device *dax_dev); +struct dax_device *dax_dev_get(dev_t devt); void dax_write_cache(struct dax_device *dax_dev, bool wc); bool dax_write_cache_enabled(struct dax_device *dax_dev); bool dax_synchronous(struct dax_device *dax_dev); -- 2.52.0