netdev - [PATCH 08/18] bpf: Separate kallsyms add/del functions

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Date:   Sun, 16 Feb 2020 20:29:55 +0100
From:   Jiri Olsa <jolsa@...nel.org>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        Andrii Nakryiko <andriin@...com>, Yonghong Song <yhs@...com>,
        Song Liu <songliubraving@...com>,
        Martin KaFai Lau <kafai@...com>,
        Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...hat.com>,
        Björn Töpel <bjorn.topel@...el.com>,
        John Fastabend <john.fastabend@...il.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 08/18] bpf: Separate kallsyms add/del functions

Moving bpf_prog_ksym_node_add/del to __bpf_ksym_add/del
and changing the argument to 'struct bpf_ksym' object.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 kernel/bpf/core.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 2fc6b28291cf..f361cfdf8d9e 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -648,20 +648,20 @@ static LIST_HEAD(bpf_kallsyms);
 static struct latch_tree_root bpf_ksym_tree __cacheline_aligned;
 static struct latch_tree_root bpf_tree __cacheline_aligned;
 
-static void bpf_prog_ksym_node_add(struct bpf_prog_aux *aux)
+static void __bpf_ksym_add(struct bpf_ksym *ksym)
 {
-	WARN_ON_ONCE(!list_empty(&aux->ksym.lnode));
-	list_add_tail_rcu(&aux->ksym.lnode, &bpf_kallsyms);
-	latch_tree_insert(&aux->ksym.tnode, &bpf_ksym_tree, &bpf_ksym_tree_ops);
+	WARN_ON_ONCE(!list_empty(&ksym->lnode));
+	list_add_tail_rcu(&ksym->lnode, &bpf_kallsyms);
+	latch_tree_insert(&ksym->tnode, &bpf_ksym_tree, &bpf_ksym_tree_ops);
 }
 
-static void bpf_prog_ksym_node_del(struct bpf_prog_aux *aux)
+static void __bpf_ksym_del(struct bpf_ksym *ksym)
 {
-	if (list_empty(&aux->ksym.lnode))
+	if (list_empty(&ksym->lnode))
 		return;
 
-	latch_tree_erase(&aux->ksym.tnode, &bpf_ksym_tree, &bpf_ksym_tree_ops);
-	list_del_rcu(&aux->ksym.lnode);
+	latch_tree_erase(&ksym->tnode, &bpf_ksym_tree, &bpf_ksym_tree_ops);
+	list_del_rcu(&ksym->lnode);
 }
 
 static bool bpf_prog_kallsyms_candidate(const struct bpf_prog *fp)
@@ -686,7 +686,7 @@ void bpf_prog_kallsyms_add(struct bpf_prog *fp)
 
 	spin_lock_bh(&bpf_lock);
 	latch_tree_insert(&fp->aux->ksym_tnode, &bpf_tree, &bpf_tree_ops);
-	bpf_prog_ksym_node_add(fp->aux);
+	__bpf_ksym_add(&fp->aux->ksym);
 	spin_unlock_bh(&bpf_lock);
 }
 
@@ -697,7 +697,7 @@ void bpf_prog_kallsyms_del(struct bpf_prog *fp)
 
 	spin_lock_bh(&bpf_lock);
 	latch_tree_erase(&fp->aux->ksym_tnode, &bpf_tree, &bpf_tree_ops);
-	bpf_prog_ksym_node_del(fp->aux);
+	__bpf_ksym_del(&fp->aux->ksym);
 	spin_unlock_bh(&bpf_lock);
 }
 
-- 
2.24.1