drm: use idr_init_base() to initialize master->lessee_idr

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/20220701185303.284082-5-dakr@redhat.com

diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 63395bebaa6b9f241211bbfdfd806bd0182a825a..cf92a9ae8034c94c508f9f23cdbff1144952bb1c 100644 (file)
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -147,7 +147,7 @@ struct drm_master *drm_master_create(struct drm_device *dev)
        INIT_LIST_HEAD(&master->lessees);
        INIT_LIST_HEAD(&master->lessee_list);
        idr_init(&master->leases);
-       idr_init(&master->lessee_idr);
+       idr_init_base(&master->lessee_idr, 1);
 
        return master;
 }