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drm/amd: kill the outdated "Only the pthreads threading model is supported" checks

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Nowadays task->group_leader->mm != task->mm is only possible if a) task is
not a group leader and b) task->group_leader->mm == NULL because
task->group_leader has already exited using sys_exit().

I don't think that drm/amd tries to detect/nack this case.

Link: https://lkml.kernel.org/r/aXY_yLVHd63UlWtm@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Christan König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <felix.kuehling@amd.com>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Simon Horman <horms@kernel.org>
Cc: Steven Price <steven.price@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Oleg Nesterov
2026-01-25 17:07:36 +01:00
committed by Andrew Morton
parent 7d08e0916a
commit a87da7a9fa
2 changed files with 0 additions and 13 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@@ -2551,9 +2551,6 @@ void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
vm->task_info->task.pid = current->pid;
get_task_comm(vm->task_info->task.comm, current);
if (current->group_leader->mm != current->mm)
return;
vm->task_info->tgid = current->tgid;
get_task_comm(vm->task_info->process_name, current->group_leader);
}

10
drivers/gpu/drm/amd/amdkfd/kfd_process.c
View File

@@ -833,12 +833,6 @@ struct kfd_process *kfd_create_process(struct task_struct *thread)
if (!(thread->mm && mmget_not_zero(thread->mm)))
return ERR_PTR(-EINVAL);
/* Only the pthreads threading model is supported. */
if (thread->group_leader->mm != thread->mm) {
mmput(thread->mm);
return ERR_PTR(-EINVAL);
}
/* If the process just called exec(3), it is possible that the
* cleanup of the kfd_process (following the release of the mm
* of the old process image) is still in the cleanup work queue.
@@ -918,10 +912,6 @@ struct kfd_process *kfd_get_process(const struct task_struct *thread)
if (!thread->mm)
return ERR_PTR(-EINVAL);
/* Only the pthreads threading model is supported. */
if (thread->group_leader->mm != thread->mm)
return ERR_PTR(-EINVAL);
process = find_process(thread, false);
if (!process)
return ERR_PTR(-EINVAL);