From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Thu, 11 Mar 2021 13:15:05 +0000 (+0000)
Subject: bpf: Make symbol 'bpf_task_storage_busy' static
X-Git-Tag: v5.15~1236^2~398^2~11
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4d0b93896ff8d6795ad8d1b604e41aa850d5a635;p=platform%2Fkernel%2Flinux-starfive.git

bpf: Make symbol 'bpf_task_storage_busy' static

The sparse tool complains as follows:

kernel/bpf/bpf_task_storage.c:23:1: warning:
 symbol '__pcpu_scope_bpf_task_storage_busy' was not declared. Should it be static?

This symbol is not used outside of bpf_task_storage.c, so this
commit marks it static.

Fixes: bc235cdb423a ("bpf: Prevent deadlock from recursive bpf_task_storage_[get|delete]")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20210311131505.1901509-1-weiyongjun1@huawei.com
---

diff --git a/kernel/bpf/bpf_task_storage.c b/kernel/bpf/bpf_task_storage.c
index fd3c74e..3ce7575 100644
--- a/kernel/bpf/bpf_task_storage.c
+++ b/kernel/bpf/bpf_task_storage.c
@@ -20,7 +20,7 @@
 
 DEFINE_BPF_STORAGE_CACHE(task_cache);
 
-DEFINE_PER_CPU(int, bpf_task_storage_busy);
+static DEFINE_PER_CPU(int, bpf_task_storage_busy);
 
 static void bpf_task_storage_lock(void)
 {