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sched_ext: Factor out scx_dsq_list_node cursor initialization into INIT_DSQ_LIST_CURSOR

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Factor out scx_dsq_list_node cursor initialization into INIT_DSQ_LIST_CURSOR
macro in preparation for additional users.

Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Cc: Dan Schatzberg <schatzberg.dan@gmail.com>
Acked-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
2025-11-11 09:18:14 -10:00
parent c948d9f80c
commit d2974cc79f
2 changed files with 9 additions and 3 deletions
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7
include/linux/sched/ext.h
View File

@@ -149,6 +149,13 @@ struct scx_dsq_list_node {
u32 priv; /* can be used by iter cursor */
};
#define INIT_DSQ_LIST_CURSOR(__node, __flags, __priv) \
(struct scx_dsq_list_node) { \
.node = LIST_HEAD_INIT((__node).node), \
.flags = SCX_DSQ_LNODE_ITER_CURSOR | (__flags), \
.priv = (__priv), \
}
/*
* The following is embedded in task_struct and contains all fields necessary
* for a task to be scheduled by SCX.

5
kernel/sched/ext.c
View File

@@ -6253,9 +6253,8 @@ __bpf_kfunc int bpf_iter_scx_dsq_new(struct bpf_iter_scx_dsq *it, u64 dsq_id,
if (!kit->dsq)
return -ENOENT;
INIT_LIST_HEAD(&kit->cursor.node);
kit->cursor.flags = SCX_DSQ_LNODE_ITER_CURSOR | flags;
kit->cursor.priv = READ_ONCE(kit->dsq->seq);
kit->cursor = INIT_DSQ_LIST_CURSOR(kit->cursor, flags,
READ_ONCE(kit->dsq->seq));
return 0;
}