gpu: nvgpu: Remove support for old kernel version

Remove support for pre-4.4 kernels. This allows deleting the checks
for kernel version, and usage of linux/version.h.

Change-Id: I4d6cb30512ea164d27549f4f4d096e5931bb1379
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1543499
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 29 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/sync_gk20a.c b/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
index 247f3d63..deaf19a1 100644
--- a/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
@@ -13,7 +13,6 @@
  * more details.
  */
 
-#include <linux/version.h>
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/hrtimer.h>
@@ -75,23 +74,6 @@ int gk20a_is_sema_backed_sync_fence(struct sync_fence *fence)
 {
         struct sync_timeline *t;
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
-        struct sync_pt *spt;
-        int i = 0;
-
-        if (list_empty(&fence->pt_list_head))
-                return 0;
-
-        list_for_each_entry(spt, &fence->pt_list_head, pt_list) {
-                i++;
-
-                if (i >= 2)
-                        return 0;
-        }
-
-        spt = list_first_entry(&fence->pt_list_head, struct sync_pt, pt_list);
-        t = spt->parent;
-#else
         struct fence *pt = fence->cbs[0].sync_pt;
         struct sync_pt *spt = sync_pt_from_fence(pt);
 
@@ -102,7 +84,6 @@ int gk20a_is_sema_backed_sync_fence(struct sync_fence *fence)
                 return 0;
 
         t = sync_pt_parent(spt);
-#endif
 
         if (t->ops == &gk20a_sync_timeline_ops)
                 return 1;
@@ -114,15 +95,6 @@ struct nvgpu_semaphore *gk20a_sync_fence_get_sema(struct sync_fence *f)
         struct sync_pt *spt;
         struct gk20a_sync_pt_inst *pti;
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)
-        if (!f)
-                return NULL;
-
-        if (!gk20a_is_sema_backed_sync_fence(f))
-                return NULL;
-
-        spt = list_first_entry(&f->pt_list_head, struct sync_pt, pt_list);
-#else
         struct fence *pt;
 
         if (!f)
@@ -133,7 +105,6 @@ struct nvgpu_semaphore *gk20a_sync_fence_get_sema(struct sync_fence *f)
 
         pt = f->cbs[0].sync_pt;
         spt = sync_pt_from_fence(pt);
-#endif
         pti = container_of(spt, struct gk20a_sync_pt_inst, pt);
 
         return pti->shared->sema;