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Wong" , Randy Dunlap , Jeff Layton , Amir Goldstein , Jonathan Cameron , Stefan Hajnoczi , Joanne Koong , Josef Bacik , Bagas Sanjaya , Chen Linxuan , 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, John Groves Subject: [PATCH V3 08/21] dax: export dax_dev_get() Date: Wed, 7 Jan 2026 09:33:17 -0600 Message-ID: <20260107153332.64727-9-john@groves.net> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260107153332.64727-1-john@groves.net> References: <20260107153244.64703-1-john@groves.net> <20260107153332.64727-1-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 68c45b918cff..c14b07be6a4e 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -511,7 +511,7 @@ 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; @@ -534,6 +534,7 @@ 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 76f2a75f3144..2a04c3535806 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -56,6 +56,7 @@ struct dax_device *alloc_dax(void *private, const struct dax_operations *ops); int fs_dax_get(struct dax_device *dax_dev, void *holder, const struct dax_holder_operations *hops); struct dax_device *inode_dax(struct inode *inode); #endif +struct dax_device *dax_dev_get(dev_t devt); void *dax_holder(struct dax_device *dax_dev); void put_dax(struct dax_device *dax_dev); void kill_dax(struct dax_device *dax_dev); -- 2.49.0