Re: linux-next: build failure after merge of the amdgpu tree

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Hi all,

On Fri, 12 Jun 2020 10:25:52 +1000 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> After merging the amdgpu tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c: In function 'kfd_sdma_activity_worker':
> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:118:2: error: implicit declaration of function 'use_mm' [-Werror=implicit-function-declaration]
>   118 |  use_mm(mm);
>       |  ^~~~~~
> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:145:2: error: implicit declaration of function 'unuse_mm' [-Werror=implicit-function-declaration]
>   145 |  unuse_mm(mm);
>       |  ^~~~~~~~
> 
> Caused by commit
> 
>   32cb59f31362 ("drm/amdkfd: Track SDMA utilization per process")
> 
> interacting with commit
> 
>   f5678e7f2ac3 ("kernel: better document the use_mm/unuse_mm API contract")
> 
> from Linus' tree.
> 
> I have applied the following merge fix for today (that was previously
> part of the akpm tree).

The merge fix patch now looks like:

From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Thu, 28 May 2020 20:15:34 +1000
Subject: [PATCH] drm/amdkfd: fix up for {un}use_mm() rename

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdkfd/kfd_process.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 013c2b018edc..40695d52e9a8 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -184,7 +184,7 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
 	if (!mm)
 		goto cleanup;
 
-	use_mm(mm);
+	kthread_use_mm(mm);
 
 	list_for_each_entry(sdma_q, &sdma_q_list.list, list) {
 		val = 0;
@@ -198,7 +198,7 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
 		}
 	}
 
-	unuse_mm(mm);
+	kthread_unuse_mm(mm);
 	mmput(mm);
 
 	/*

-- 
Cheers,
Stephen Rothwell

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