Commit d2974cc7 authored by Tejun Heo's avatar Tejun Heo
Browse files

sched_ext: Factor out scx_dsq_list_node cursor initialization into INIT_DSQ_LIST_CURSOR 



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

Reviewed-by: default avatarEmil Tsalapatis <emil@etsalapatis.com>
Cc: Dan Schatzberg <schatzberg.dan@gmail.com>
Acked-by: default avatarAndrea Righi <arighi@nvidia.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent c948d9f8

include/linux/sched/ext.h

+7 −0
Original line number Diff line number Diff line
@@ -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.

kernel/sched/ext.c

+2 −3
Original line number Diff line number Diff line
@@ -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;

}