From 1d602b35a5dcfbcc76f71fe310f42eee3708236e Mon Sep 17 00:00:00 2001
From: Danilo Krummrich <dakr@redhat.com>
Date: Fri, 1 Jul 2022 20:52:54 +0200
Subject: drm/amdgpu: use idr_init_base() to initialize mgr->ctx_handles
Git-commit: 2ddd1e6ccb139b9e7f1fed2883e34add832cbd77
Patch-mainline: v6.1-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
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, 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/20220701185303.284082-2-dakr@redhat.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 8ee4e8491f39..afe22f83d4a6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -848,7 +848,7 @@ void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr,
mgr->adev = adev;
mutex_init(&mgr->lock);
- idr_init(&mgr->ctx_handles);
+ idr_init_base(&mgr->ctx_handles, 1);
for (i = 0; i < AMDGPU_HW_IP_NUM; ++i)
atomic64_set(&mgr->time_spend[i], 0);
--
2.38.1