drm/amd/amdgpu: Simplify mask creation in gfx6

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
index 1f1b619..6569554 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
@@ -911,13 +911,7 @@ static void gfx_v6_0_select_se_sh(struct amdgpu_device *adev, u32 se_num,
 
 static u32 gfx_v6_0_create_bitmask(u32 bit_width)
 {
-       u32 i, mask = 0;
-
-       for (i = 0; i < bit_width; i++) {
-               mask <<= 1;
-               mask |= 1;
-       }
-       return mask;
+       return (u32)(((u64)1 << bit_width) - 1);
 }
 
 static u32 gfx_v6_0_get_rb_disabled(struct amdgpu_device *adev,