From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Fri, 1 Dec 2017 13:28:46 +0100
Subject: drm/amdgpu: avoid the modulo in amdgpu_vm_get_entry
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Git-commit: e3a1b32a12ef83e260a307e678d053d5f4570acd
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
We can do this with a simple mask as well.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1285,11 +1285,11 @@ void amdgpu_vm_get_entry(struct amdgpu_p
*parent = NULL;
*entry = &p->vm->root;
while ((*entry)->entries) {
- unsigned idx = addr >> amdgpu_vm_level_shift(p->adev, level++);
+ unsigned shift = amdgpu_vm_level_shift(p->adev, level++);
- idx %= amdgpu_bo_size((*entry)->base.bo) / 8;
*parent = *entry;
- *entry = &(*entry)->entries[idx];
+ *entry = &(*entry)->entries[addr >> shift];
+ addr &= (1ULL << shift) - 1;
}
if (level != p->adev->vm_manager.num_level)