Subject: linux-next: build failure after merge of the iommu tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 21 Sep 2020 14:09:01 +1000

Hi all,

After merging the iommu tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

drivers/gpu/drm/msm/msm_iommu.c: In function 'msm_iommu_pagetable_unmap':
drivers/gpu/drm/msm/msm_iommu.c:46:2: error: implicit declaration of function 'iommu_flush_tlb_all'; did you mean 'iommu_flush_iotlb_all'? [-Werror=implicit-function-declaration]
   46 |  iommu_flush_tlb_all(to_msm_iommu(pagetable->parent)->domain);
      |  ^~~~~~~~~~~~~~~~~~~
      |  iommu_flush_iotlb_all

Caused by commit

  aae4c8e27bd7 ("iommu: Rename iommu_tlb_* functions to iommu_iotlb_*")

interacting with commit

  b145c6e65eb0 ("drm/msm: Add support to create a local pagetable")

from the drm-msm tree.

I have applied the following merge fix patch.  Someone will need to tell
Linus about this fix up when the trees get merged.

From: Stephen Rothwell <[email-masked]>
Date: Mon, 21 Sep 2020 14:04:14 +1000
Subject: [PATCH] merge fix upt for iommu_flush_iotlb_all() rename

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 drivers/gpu/drm/msm/msm_iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c
index 3a83ffdb3b90..22ac7c692a81 100644
--- a/drivers/gpu/drm/msm/msm_iommu.c
+++ b/drivers/gpu/drm/msm/msm_iommu.c
@@ -43,7 +43,7 @@ static int msm_iommu_pagetable_unmap(struct msm_mmu *mmu, u64 iova,
 		size -= 4096;
 	}
 
-	iommu_flush_tlb_all(to_msm_iommu(pagetable->parent)->domain);
+	iommu_flush_iotlb_all(to_msm_iommu(pagetable->parent)->domain);
 
 	return (unmapped == size) ? 0 : -EINVAL;
 }
@@ -199,7 +199,7 @@ struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent)
 
 	/*
 	 * TODO we would like each set of page tables to have a unique ASID
-	 * to optimize TLB invalidation.  But iommu_flush_tlb_all() will
+	 * to optimize TLB invalidation.  But iommu_flush_iotlb_all() will
 	 * end up flushing the ASID used for TTBR1 pagetables, which is not
 	 * what we want.  So for now just use the same ASID as TTBR1.
 	 */
-- 
2.28.0

-- 
Cheers,
Stephen Rothwell