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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2017-10-27 19:35:19 -0400 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2017-10-27 19:35:19 -0400 |
| commit | 9b56bb115460cee92a80bf85232b4b7da2f080e6 (patch) | |
| tree | a2c2d9888ab7e38c5659af2e7e47798ac4c2af6b /drivers/gpu/drm/amd/amdkfd/kfd_process.c | |
| parent | 66b783b4465de05ce6b370b1ae97e95b0fc14a34 (diff) | |
| download | linux-9b56bb115460cee92a80bf85232b4b7da2f080e6.tar.bz2 | |
drm/amdkfd: Don't dereference kfd_process.mm
The kfd_process doesn't own a reference to the mm_struct, so it can
disappear without warning even while the kfd_process still exists.
Therefore, avoid dereferencing the kfd_process.mm pointer and make
it opaque. Use get_task_mm to get a temporary reference to the mm
when it's needed.
v2: removed unnecessary WARN_ON
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_process.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_process.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 3ccb3b53216e..695fa2ae8e5b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -200,7 +200,6 @@ static void kfd_process_destroy_delayed(struct rcu_head *rcu) struct kfd_process *p; p = container_of(rcu, struct kfd_process, rcu); - WARN_ON(atomic_read(&p->mm->mm_count) <= 0); mmdrop(p->mm); |