From: Miaoqian Lin <linmq006@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: linmq006@gmail.com, Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
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>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: [PATCH] perf tools: Use IS_ERR_OR_NULL() to clean code and fix check
Date: Sun, 12 Dec 2021 13:56:09 +0000 [thread overview]
Message-ID: <20211212135613.20000-1-linmq006@gmail.com> (raw)
Use IS_ERR_OR_NULL() to make the code cleaner.
Also if the priv is NULL, it's improper to call PTR_ERR(priv).
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
tools/perf/util/bpf-loader.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index fbb3c4057c30..22662fc85cc9 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -421,7 +421,7 @@ preproc_gen_prologue(struct bpf_program *prog, int n,
size_t prologue_cnt = 0;
int i, err;
- if (IS_ERR(priv) || !priv || priv->is_tp)
+ if (IS_ERR_OR_NULL(priv) || priv->is_tp)
goto errout;
pev = &priv->pev;
@@ -570,7 +570,7 @@ static int hook_load_preprocessor(struct bpf_program *prog)
bool need_prologue = false;
int err, i;
- if (IS_ERR(priv) || !priv) {
+ if (IS_ERR_OR_NULL(priv)) {
pr_debug("Internal error when hook preprocessor\n");
return -BPF_LOADER_ERRNO__INTERNAL;
}
@@ -642,8 +642,11 @@ int bpf__probe(struct bpf_object *obj)
goto out;
priv = bpf_program__priv(prog);
- if (IS_ERR(priv) || !priv) {
- err = PTR_ERR(priv);
+ if (IS_ERR_OR_NULL(priv)) {
+ if (!priv)
+ err = -BPF_LOADER_ERRNO__INTERNAL;
+ else
+ err = PTR_ERR(priv);
goto out;
}
@@ -693,7 +696,7 @@ int bpf__unprobe(struct bpf_object *obj)
struct bpf_prog_priv *priv = bpf_program__priv(prog);
int i;
- if (IS_ERR(priv) || !priv || priv->is_tp)
+ if (IS_ERR_OR_NULL(priv) || priv->is_tp)
continue;
for (i = 0; i < priv->pev.ntevs; i++) {
@@ -751,7 +754,7 @@ int bpf__foreach_event(struct bpf_object *obj,
struct perf_probe_event *pev;
int i, fd;
- if (IS_ERR(priv) || !priv) {
+ if (IS_ERR_OR_NULL(priv)) {
pr_debug("bpf: failed to get private field\n");
return -BPF_LOADER_ERRNO__INTERNAL;
}
--
2.17.1
reply other threads:[~2021-12-12 13:56 UTC|newest]
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