From d9198ac421ad74fc05ebce318fe98c2c23cb5c88 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Tue, 23 Nov 2021 21:46:58 +0100
Subject: drm/amdkfd: Slighly optimize 'init_doorbell_bitmap()'
Git-commit: f37668301e362a0ed4b0b2ec6866f0a02fefa4db
Patch-mainline: v5.17-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
The 'doorbell_bitmap' bitmap has just been allocated. So we can use the
non-atomic '__set_bit()' function to save a few cycles as no concurrent
access can happen.
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 67bb1654becc..9158f9754a24 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1446,9 +1446,9 @@ static int init_doorbell_bitmap(struct qcm_process_device *qpd,
for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS / 2; i++) {
if (i >= range_start && i <= range_end) {
- set_bit(i, qpd->doorbell_bitmap);
- set_bit(i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET,
- qpd->doorbell_bitmap);
+ __set_bit(i, qpd->doorbell_bitmap);
+ __set_bit(i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET,
+ qpd->doorbell_bitmap);
}
}
--
2.38.1