From 8bb30798fd6ee79e4041a32ca85b9f70345d8671 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Mon, 15 Jul 2024 10:10:26 +0800
Subject: [PATCH] sched_ext: Fixes incorrect type in bpf_scx_init()
The type_id is defined as u32type, if(type_id<0) is invalid, hence
modified its type to s32.
./kernel/sched/ext.c:4958:5-12: WARNING: Unsigned expression compared with zero: type_id < 0.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9523
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---
kernel/sched/ext.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 03da2cecb5471..da9cac6b6cc2a 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -5057,7 +5057,7 @@ static void bpf_scx_unreg(void *kdata, struct bpf_link *link)
static int bpf_scx_init(struct btf *btf)
{
- u32 type_id;
+ s32 type_id;
type_id = btf_find_by_name_kind(btf, "task_struct", BTF_KIND_STRUCT);
if (type_id < 0)
--
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