drm/amdgpu: use idr_init_base() to initialize fpriv->bo_list_handles

idr_init_base(), implemented by commit 6ce711f27500 ("idr: Make 1-based
IDRs more efficient"), let us set an arbitrary base other than
idr_init(), which uses base 0.

Since, for this IDR, no ID < 1 is ever requested/allocated, using
idr_init_base(&idr, 1) avoids unnecessary tree walks.

Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220701185303.284082-3-dakr@redhat.com

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 6de63ea6687eb05df55f1d1f3e32c9ddadb7cb49..103927c48d05183fff7edaf68d904d1de88b1b32 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1148,7 +1148,7 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
        }
 
        mutex_init(&fpriv->bo_list_lock);
-       idr_init(&fpriv->bo_list_handles);
+       idr_init_base(&fpriv->bo_list_handles, 1);
 
        amdgpu_ctx_mgr_init(&fpriv->ctx_mgr, adev);