drm/amdgpu: use kernel is_power_of_2 rather than local version

Use the kernel provided version.

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/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2fe1e0a..f3811f6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1031,19 +1031,6 @@ 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,
@@ -1077,7 +1064,7 @@ 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;
@@ -1118,7 +1105,7 @@ 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);
@@ -1138,7 +1125,7 @@ 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;