linux-kernel - [PATCH 1/2] bpf: Fix warning of Using plain integer as NULL pointer

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Message-ID: <YxOjRm5xqL68JVnt@playground>
Date:   Sat, 3 Sep 2022 19:56:06 +0100
From:   Jules Irenge <jbi.octave@...il.com>
To:     ast@...nel.org
Cc:     john.fastabend@...il.com, andrii@...nel.org, daniel@...earbox.net,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        martin.lau@...ux.dev, jbi.octave@...il.com
Subject: [PATCH 1/2] bpf: Fix warning of Using plain integer as NULL pointer

This patch fixes a warning generated by Sparse

"Using plain integer as NULL pointer"

by replacing the offending 0 by NULL.

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 kernel/bpf/syscall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 27760627370d..427b7e3829e0 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -598,7 +598,7 @@ void bpf_map_free_kptrs(struct bpf_map *map, void *map_value)
 		if (off_desc->type == BPF_KPTR_UNREF) {
 			u64 *p = (u64 *)btf_id_ptr;
 
-			WRITE_ONCE(p, 0);
+			WRITE_ONCE(p, NULL);
 			continue;
 		}
 		old_ptr = xchg(btf_id_ptr, 0);
-- 
2.35.1