From: Tianchen Ding Date: Thu, 17 Oct 2024 02:44:12 +0000 (+0800) Subject: sched_ext: Use btf_ids to resolve task_struct X-Git-Tag: v6.13-rc1~164^2~18 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba1c9d327e7ffb7b931fc2b5209aae532ffee5a5;p=thirdparty%2Flinux.git sched_ext: Use btf_ids to resolve task_struct Save the searching time during bpf_scx_init. Signed-off-by: Tianchen Ding Signed-off-by: Tejun Heo --- diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index fe8acae35166b..06c45d6c5be1f 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -5324,7 +5324,6 @@ err_disable: 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, @@ -5376,7 +5375,7 @@ 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; } @@ -5528,13 +5527,7 @@ 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; }