Save the searching time during bpf_scx_init. Signed-off-by: Tianchen Ding <dtcccc@xxxxxxxxxxxxxxxxx> --- v2: Use the existing btf_tracing_ids[BTF_TRACING_TYPE_TASK]. v1: https://lore.kernel.org/all/20241016024100.7409-1-dtcccc@xxxxxxxxxxxxxxxxx/ --- kernel/sched/ext.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 609b9fb00d6f..09fe4e1552bb 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -5343,7 +5343,6 @@ static int scx_ops_enable(struct sched_ext_ops *ops, struct bpf_link *link) extern struct btf *btf_vmlinux; static const struct btf_type *task_struct_type; -static u32 task_struct_type_id; static bool set_arg_maybe_null(const char *op, int arg_n, int off, int size, enum bpf_access_type type, @@ -5395,7 +5394,7 @@ static bool set_arg_maybe_null(const char *op, int arg_n, int off, int size, */ info->reg_type = PTR_MAYBE_NULL | PTR_TO_BTF_ID | PTR_TRUSTED; info->btf = btf_vmlinux; - info->btf_id = task_struct_type_id; + info->btf_id = btf_tracing_ids[BTF_TRACING_TYPE_TASK]; return true; } @@ -5547,13 +5546,7 @@ static void bpf_scx_unreg(void *kdata, struct bpf_link *link) static int bpf_scx_init(struct btf *btf) { - s32 type_id; - - type_id = btf_find_by_name_kind(btf, "task_struct", BTF_KIND_STRUCT); - if (type_id < 0) - return -EINVAL; - task_struct_type = btf_type_by_id(btf, type_id); - task_struct_type_id = type_id; + task_struct_type = btf_type_by_id(btf, btf_tracing_ids[BTF_TRACING_TYPE_TASK]); return 0; } -- 2.39.3
