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

idr_init_base(), implemented by commit 6ce711f275 ("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/20220701185303.284082-4-dakr@redhat.com
This commit is contained in:
Danilo Krummrich 2022-07-01 20:52:56 +02:00 committed by Maxime Ripard
parent c4f306e316
commit a49afeb416
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1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_auth.c
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@ -140,7 +140,7 @@ struct drm_master *drm_master_create(struct drm_device *dev)
kref_init(&master->refcount);
drm_master_legacy_init(master);
idr_init(&master->magic_map);
idr_init_base(&master->magic_map, 1);
master->dev = dev;
/* initialize the tree of output resource lessees */