dmaengine: idxd: make idxd_register/unregister_dma_channel() static

mainline inclusion
from mainline-v5.19
commit 8e6226f0
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 8e6226f0 dmaengine: idxd: make idxd_register/unregister_dma_channel() static.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Since idxd_register/unregister_dma_channel() are only called locally, make
them static.
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/165187583222.3287435.12882651040433040246.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

drivers/dma/idxd/dma.c

@@ -250,7 +250,7 @@ void idxd_unregister_dma_device(struct idxd_device *idxd)
 	dma_async_device_unregister(&idxd->idxd_dma->dma);
 }
 
-int idxd_register_dma_channel(struct idxd_wq *wq)
+static int idxd_register_dma_channel(struct idxd_wq *wq)
 {
 	struct idxd_device *idxd = wq->idxd;
 	struct dma_device *dma = &idxd->idxd_dma->dma;
@@ -287,7 +287,7 @@ int idxd_register_dma_channel(struct idxd_wq *wq)
 	return 0;
 }
 
-void idxd_unregister_dma_channel(struct idxd_wq *wq)
+static void idxd_unregister_dma_channel(struct idxd_wq *wq)
 {
 	struct idxd_dma_chan *idxd_chan = wq->idxd_chan;
 	struct dma_chan *chan = &idxd_chan->chan;

drivers/dma/idxd/idxd.h

@@ -612,8 +612,6 @@ int idxd_enqcmds(struct idxd_wq *wq, void __iomem *portal, const void *desc);
 /* dmaengine */
 int idxd_register_dma_device(struct idxd_device *idxd);
 void idxd_unregister_dma_device(struct idxd_device *idxd);
-int idxd_register_dma_channel(struct idxd_wq *wq);
-void idxd_unregister_dma_channel(struct idxd_wq *wq);
 void idxd_parse_completion_status(u8 status, enum dmaengine_tx_result *res);
 void idxd_dma_complete_txd(struct idxd_desc *desc,
 			   enum idxd_complete_type comp_type, bool free_desc);