leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/amdkfd: Get reference to lead_thread task struct

Browse Source 
Increment the kfd_process.lead_thread's reference counter to make
it safe to dereference. This is needed for getting a safe reference
to the process' mm_struct.

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>
This commit is contained in:
Felix Kuehling 2017-11-27 18:29:50 -05:00 committed by Oded Gabbay
parent 851a645efd
commit c7b1243eef
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/amd/amdkfd/kfd_process.c
View File

@ -24,6 +24,7 @@
#include <linux/log2.h>
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/sched/task.h>
#include <linux/slab.h>
#include <linux/amd-iommu.h>
#include <linux/notifier.h>
@ -191,6 +192,8 @@ static void kfd_process_wq_release(struct work_struct *work)
mutex_destroy(&p->mutex);
put_task_struct(p->lead_thread);
kfree(p);
kfree(work);
@ -342,6 +345,7 @@ static struct kfd_process *create_process(const struct task_struct *thread)
(uintptr_t)process->mm);
process->lead_thread = thread->group_leader;
get_task_struct(process->lead_thread);
INIT_LIST_HEAD(&process->per_device_data);