gpu: nvgpu: Implement abstraction for finding TGID

Implement abstraction for finding the process ID of thread currently
being run. This is tracked for context switch tracing.

In Linux kernel this is implemented by returning TGID.

Change-Id: Ia6bcbd92c8cc25467694a35476e5d5f717194105
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1615985
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
index 4efcfda8..64d521a0 100644
--- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
@@ -22,6 +22,7 @@
 
 #include <nvgpu/kmem.h>
 #include <nvgpu/log.h>
+#include <nvgpu/os_sched.h>
 
 #include "gk20a.h"
 #include "tsg_gk20a.h"
@@ -286,7 +287,7 @@ struct tsg_gk20a *gk20a_tsg_open(struct gk20a *g)
         tsg->timeslice_timeout = 0;
         tsg->timeslice_scale = 0;
         tsg->runlist_id = ~0;
-        tsg->tgid = current->tgid;
+        tsg->tgid = nvgpu_current_pid(g);
 
         if (g->ops.fifo.init_eng_method_buffers)
                 g->ops.fifo.init_eng_method_buffers(g, tsg);