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From:   CGEL <cgel.zte@gmail.com>
To:     Shuah Khan <shuah@kernel.org>
Cc:     Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
        Andrei Matei <andreimatei1@gmail.com>,
        linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
        bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
        jing yangyang <jing.yangyang@zte.com.cn>,
        Zeal Robot <zealci@zte.com.cn>
Subject: [PATCH linux-next] tools: fix warning comparing pointer to 0
Date:   Thu, 19 Aug 2021 20:30:57 -0700
Message-Id: <20210820033057.13063-1-jing.yangyang@zte.com.cn>
MIME-Version: 1.0
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From: jing yangyang <jing.yangyang@zte.com.cn>

Fix the following coccicheck warning:
./tools/testing/selftests/bpf/progs/profiler.inc.h:364:18-22:WARNING
comparing pointer to 0
./tools/testing/selftests/bpf/progs/profiler.inc.h:537:23-27:WARNING
comparing pointer to 0
./tools/testing/selftests/bpf/progs/profiler.inc.h:544:21-25:WARNING
comparing pointer to 0
./tools/testing/selftests/bpf/progs/profiler.inc.h:770:13-17:WARNING
comparing pointer to 0

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: jing yangyang <jing.yangyang@zte.com.cn>
---
 tools/testing/selftests/bpf/progs/profiler.inc.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h
index 4896fdf..5c0bdab 100644
--- a/tools/testing/selftests/bpf/progs/profiler.inc.h
+++ b/tools/testing/selftests/bpf/progs/profiler.inc.h
@@ -361,7 +361,7 @@ static INLINE void* populate_var_metadata(struct var_metadata_t* metadata,
 	int zero = 0;
 	struct var_kill_data_t* kill_data = bpf_map_lookup_elem(&data_heap, &zero);
 
-	if (kill_data == NULL)
+	if (!kill_dat)
 		return NULL;
 	struct task_struct* task = (struct task_struct*)bpf_get_current_task();
 
@@ -534,14 +534,14 @@ static INLINE bool is_dentry_allowed_for_filemod(struct dentry* file_dentry,
 	*device_id = dev_id;
 	bool* allowed_device = bpf_map_lookup_elem(&allowed_devices, &dev_id);
 
-	if (allowed_device == NULL)
+	if (!allowed_device)
 		return false;
 
 	u64 ino = BPF_CORE_READ(file_dentry, d_inode, i_ino);
 	*file_ino = ino;
 	bool* allowed_file = bpf_map_lookup_elem(&allowed_file_inodes, &ino);
 
-	if (allowed_file == NULL)
+	if (!allowed_fil)
 		if (!is_ancestor_in_allowed_inodes(BPF_CORE_READ(file_dentry, d_parent)))
 			return false;
 	return true;
@@ -689,7 +689,7 @@ int raw_tracepoint__sched_process_exec(struct bpf_raw_tracepoint_args* ctx)
 	u64 inode = BPF_CORE_READ(bprm, file, f_inode, i_ino);
 
 	bool* should_filter_binprm = bpf_map_lookup_elem(&disallowed_exec_inodes, &inode);
-	if (should_filter_binprm != NULL)
+	if (should_filter_binprm)
 		goto out;
 
 	int zero = 0;
-- 
1.8.3.1