linux-kernel - [PATCH] tools/resolve_btfids: fix comparison of distinct pointer types warning in resolve

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Message-ID: <20240722083305.4009723-1-liwei.song.lsong@gmail.com>
Date: Mon, 22 Jul 2024 16:32:59 +0800
From: Liwei Song <liwei.song.lsong@...il.com>
To: bpf@...r.kernel.org
Cc: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
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	alan.maguire@...cle.com,
	friedrich.vock@....de,
	dxu@...uu.xyz,
	linux-kernel@...r.kernel.org,
	liwei.song.lsong@...il.com
Subject: [PATCH] tools/resolve_btfids: fix comparison of distinct pointer types warning in resolve_btfids

Add a type cast for set8->pairs to fix below compile warning:

main.c: In function 'sets_patch':
main.c:699:50: warning: comparison of distinct pointer types lacks a cast
  699 |        BUILD_BUG_ON(set8->pairs != &set8->pairs[0].id);
      |                                 ^~

Fixes: 9707ac4fe2f5 ("tools/resolve_btfids: Refactor set sorting with types from btf_ids.h")
Signed-off-by: Liwei Song <liwei.song.lsong@...il.com>
---
 tools/bpf/resolve_btfids/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c
index af393c7dee1f..b3edc239fe56 100644
--- a/tools/bpf/resolve_btfids/main.c
+++ b/tools/bpf/resolve_btfids/main.c
@@ -696,7 +696,7 @@ static int sets_patch(struct object *obj)
 			 * Make sure id is at the beginning of the pairs
 			 * struct, otherwise the below qsort would not work.
 			 */
-			BUILD_BUG_ON(set8->pairs != &set8->pairs[0].id);
+			BUILD_BUG_ON((u32 *)set8->pairs != &set8->pairs[0].id);
 			qsort(set8->pairs, set8->cnt, sizeof(set8->pairs[0]), cmp_id);
 
 			/*
-- 
1.8.3.1