[PATCH] drm/amdgpu: use kernel is_power_of_2 rather than local version

[Christian König]

Am 21.06.2017 um 18:44 schrieb Alex Deucher:
> Use the kernel provided version.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

Reviewed-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 +++----------------
>   1 file changed, 3 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 6c64551..b6efda1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -1032,19 +1032,6 @@ static unsigned int amdgpu_vga_set_decode(void *cookie, bool state)
>   		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
>   }
>   
> -/**
> - * amdgpu_check_pot_argument - check that argument is a power of two
> - *
> - * @arg: value to check
> - *
> - * Validates that a certain argument is a power of two (all asics).
> - * Returns true if argument is valid.
> - */
> -static bool amdgpu_check_pot_argument(int arg)
> -{
> -	return (arg & (arg - 1)) == 0;
> -}
> -
>   static void amdgpu_check_block_size(struct amdgpu_device *adev)
>   {
>   	/* defines number of bits in page table versus page directory,
> @@ -1078,7 +1065,7 @@ static void amdgpu_check_vm_size(struct amdgpu_device *adev)
>   	if (amdgpu_vm_size == -1)
>   		return;
>   
> -	if (!amdgpu_check_pot_argument(amdgpu_vm_size)) {
> +	if (!is_power_of_2(amdgpu_vm_size)) {
>   		dev_warn(adev->dev, "VM size (%d) must be a power of 2\n",
>   			 amdgpu_vm_size);
>   		goto def_value;
> @@ -1119,7 +1106,7 @@ static void amdgpu_check_arguments(struct amdgpu_device *adev)
>   		dev_warn(adev->dev, "sched jobs (%d) must be at least 4\n",
>   			 amdgpu_sched_jobs);
>   		amdgpu_sched_jobs = 4;
> -	} else if (!amdgpu_check_pot_argument(amdgpu_sched_jobs)){
> +	} else if (!is_power_of_2(amdgpu_sched_jobs)){
>   		dev_warn(adev->dev, "sched jobs (%d) must be a power of 2\n",
>   			 amdgpu_sched_jobs);
>   		amdgpu_sched_jobs = roundup_pow_of_two(amdgpu_sched_jobs);
> @@ -1139,7 +1126,7 @@ static void amdgpu_check_arguments(struct amdgpu_device *adev)
>   	amdgpu_check_block_size(adev);
>   
>   	if (amdgpu_vram_page_split != -1 && (amdgpu_vram_page_split < 16 ||
> -	    !amdgpu_check_pot_argument(amdgpu_vram_page_split))) {
> +	    !is_power_of_2(amdgpu_vram_page_split))) {
>   		dev_warn(adev->dev, "invalid VRAM page split (%d)\n",
>   			 amdgpu_vram_page_split);
>   		amdgpu_vram_page_split = 1024;