gpu: nvgpu: Nvgpu abstraction for linux barriers.

construct wrapper nvgpu_* methods to replace
mb,rmb,wmb,smp_mb,smp_rmb,smp_wmb,read_barrier_depends and
smp_read_barrier_depends.

NVGPU-122

Change-Id: I8d24dd70fef5cb0fadaacc15f3ab11531667a0df
Signed-off-by: Debarshi <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1541199
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sourab Gupta <sourabg@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/buddy_allocator.c b/drivers/gpu/nvgpu/common/mm/buddy_allocator.c
index 0ef94c10..3e305bb8 100644
--- a/drivers/gpu/nvgpu/common/mm/buddy_allocator.c
+++ b/drivers/gpu/nvgpu/common/mm/buddy_allocator.c
@@ -18,6 +18,7 @@
 #include <nvgpu/kmem.h>
 #include <nvgpu/bug.h>
 #include <nvgpu/log2.h>
+#include <nvgpu/barrier.h>
 
 #include "gk20a/mm_gk20a.h"
 #include "gk20a/platform_gk20a.h"
@@ -1064,7 +1065,7 @@ static int nvgpu_buddy_alloc_inited(struct nvgpu_allocator *a)
         struct nvgpu_buddy_allocator *ba = a->priv;
         int inited = ba->initialized;
 
-        rmb();
+        nvgpu_smp_rmb();
         return inited;
 }
 
@@ -1289,7 +1290,7 @@ int __nvgpu_buddy_allocator_init(struct gk20a *g, struct nvgpu_allocator *__a,
         if (err)
                 goto fail;
 
-        wmb();
+        nvgpu_smp_wmb();
         a->initialized = 1;
 
 #ifdef CONFIG_DEBUG_FS