Subject: linux-next: build warning after merge of the swiotlb tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 11 Dec 2020 13:02:08 +1100

Hi all,

After merging the swiotlb tree, today's linux-next build (arm
multi_v7_defconfig) produced this warning:

In file included from arch/arm/mm/init.c:24:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from arch/arm/mm/dma-mapping.c:17:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from kernel/dma/direct.h:10,
                 from kernel/dma/mapping.c:17:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from kernel/dma/coherent.c:10:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from kernel/dma/direct.h:10,
                 from kernel/dma/direct.c:16:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from drivers/of/device.c:8:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from drivers/remoteproc/remoteproc_core.c:27:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/dma-direct.h:13,
                 from drivers/of/address.c:16:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from drivers/mmc/host/sdhci.c:23:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/nouveau/nouveau_bo.c:31:
include/linux/swiotlb.h:108:13: warning: 'swiotlb_adjust_size' defined but not used [-Wunused-function]
  108 | static void swiotlb_adjust_size(unsigned long new_size)
      |             ^~~~~~~~~~~~~~~~~~~

Introduced by commit

  79f748d1bdb6 ("x86,swiotlb: Adjust SWIOTLB bounce buffer size for SEV guests")

Forgot the "inline" :-(
-- 
Cheers,
Stephen Rothwell