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From 7de7532c87068ec58e4473e837b6a026923b0ed5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Fri, 1 Dec 2017 13:28:46 +0100
Subject: [PATCH 3470/4131] drm/amdgpu: avoid the modulo in amdgpu_vm_get_entry
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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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>
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index ef9a24d..90a5d33 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -997,11 +997,11 @@ void amdgpu_vm_get_entry(struct amdgpu_pte_update_params *p, uint64_t addr,
*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 != AMDGPU_VM_PTB)
--
2.7.4
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