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From 57ff151880cced48d72bcf4d5334864e6a4bc0a7 Mon Sep 17 00:00:00 2001
From: Tom St Denis <tom.stdenis@amd.com>
Date: Mon, 8 Feb 2016 12:34:19 -0500
Subject: [PATCH 0297/1110] drm/amdgpu/gfx7: LOC reduction in gfx_v7_0_setup_rb
Reduce for loop with bitmask to simple complement and mask
Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
index adaa3f8..940dc0b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
@@ -1648,7 +1648,7 @@ static void gfx_v7_0_setup_rb(struct amdgpu_device *adev,
u32 max_rb_num_per_se)
{
int i, j;
- u32 data, mask;
+ u32 data;
u32 disabled_rbs = 0;
u32 enabled_rbs = 0;
@@ -1666,12 +1666,7 @@ static void gfx_v7_0_setup_rb(struct amdgpu_device *adev,
gfx_v7_0_select_se_sh(adev, 0xffffffff, 0xffffffff);
mutex_unlock(&adev->grbm_idx_mutex);
- mask = 1;
- for (i = 0; i < max_rb_num_per_se * se_num; i++) {
- if (!(disabled_rbs & mask))
- enabled_rbs |= mask;
- mask <<= 1;
- }
+ enabled_rbs = (~disabled_rbs) & ((1UL<<(max_rb_num_per_se*se_num))-1);
adev->gfx.config.backend_enable_mask = enabled_rbs;
--
2.7.4
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