Re: [PATCH 16/16] PCI: Remove usage of the deprecated "pci-dma-compat.h" API

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Le 07/01/2022 à 07:34, Christophe JAILLET a écrit :
Le 06/01/2022 à 23:28, Bjorn Helgaas a écrit :
On Thu, Jan 06, 2022 at 10:55:33PM +0100, Christophe JAILLET wrote:
Final step, remove pci-dma-compat.h

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

Obviously this has to be applied after all the others, so I assume
somebody else will take this.

---
  include/linux/pci-dma-compat.h | 129 ---------------------------------
  include/linux/pci.h            |   3 -
  2 files changed, 132 deletions(-)
  delete mode 100644 include/linux/pci-dma-compat.h

diff --git a/include/linux/pci-dma-compat.h b/include/linux/pci-dma-compat.h
deleted file mode 100644
index 249d4d7fbf18..000000000000
--- a/include/linux/pci-dma-compat.h
+++ /dev/null
@@ -1,129 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* include this file if the platform implements the dma_ DMA Mapping API
- * and wants to provide the pci_ DMA Mapping API in terms of it */
-
-#ifndef _ASM_GENERIC_PCI_DMA_COMPAT_H
-#define _ASM_GENERIC_PCI_DMA_COMPAT_H
-
-#include <linux/dma-mapping.h>
-
[...]
 >>> diff --git a/include/linux/pci.h b/include/linux/pci.h
index d4308f847e58..ba8771eaf380 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2455,9 +2455,6 @@ static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)   void pci_uevent_ers(struct pci_dev *pdev, enum  pci_ers_result err_type);
  #endif
-/* Provide the legacy pci_dma_* API */
-#include <linux/pci-dma-compat.h>
-

After one more night, I should have mentionned that the way have removed "pci-dma-compat.h" may break OTHER drives because of indirect include.

The line above should maybe be replaced by:
   #include <linux/dma-mapping.h>
which is hidden in "pci-dma-compat.h".

Will see if built-bots complain.

And so they did.

What is the best option?
1. Add    #include <linux/dma-mapping.h>?		or
2. Add this "missing" include in needed place?

I would say 2, but I would need help, because I don't have a built farm at home! :)



This breaks:

   drivers/s390/net/ism_drv.c: In function 'register_sba':
drivers/s390/net/ism_drv.c:93:15: error: implicit declaration of function 'dma_alloc_coherent' [-Werror=implicit-function-declaration] 93 | sba = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle,
         |               ^~~~~~~~~~~~~~~~~~
[...]



I got another built failure that I don't understand:

   In file included from drivers/scsi/fdomain.c:87:
>> include/scsi/scsicam.h:16:31: warning: 'struct block_device' declared inside parameter list will not be visible outside of this definition or declaration 16 | int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip);
         |                               ^~~~~~~~~~~~
include/scsi/scsicam.h:17:27: warning: 'struct block_device' declared inside parameter list will not be visible outside of this definition or declaration 17 | bool scsi_partsize(struct block_device *bdev, sector_t capacity, int geom[3]);
         |                           ^~~~~~~~~~~~
include/scsi/scsicam.h:18:40: warning: 'struct block_device' declared inside parameter list will not be visible outside of this definition or declaration
      18 | unsigned char *scsi_bios_ptable(struct block_device *bdev);
         |                                        ^~~~~~~~~~~~
   drivers/scsi/fdomain.c: In function 'fdomain_biosparam':
>> drivers/scsi/fdomain.c:468:45: error: passing argument 1 of 'scsi_bios_ptable' from incompatible pointer type [-Werror=incompatible-pointer-types]
     468 |         unsigned char *p = scsi_bios_ptable(bdev);
         |                                             ^~~~
         |                                             |
| struct block_device *
   In file included from drivers/scsi/fdomain.c:87:
include/scsi/scsicam.h:18:54: note: expected 'struct block_device *' but argument is of type 'struct block_device *'
      18 | unsigned char *scsi_bios_ptable(struct block_device *bdev);
         |                                 ~~~~~~~~~~~~~~~~~~~~~^~~~


CJ



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