mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

perf env: Remove unnecessary NULL tests 

clang-tidy was warning:
```
util/env.c:334:23: warning: Access to field 'nr_pmu_mappings' results in a dereference of a null pointer (loaded from variable 'env') [clang-analyzer-core.NullDereference]
        env->nr_pmu_mappings = pmu_num;
```

As functions are called potentially when !env was true. This condition
could never be true as it would produce a segv, so remove the
unnecessary NULL tests and silence clang-tidy.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: llvm@lists.linux.dev
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Tom Rix <trix@redhat.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20231009183920.200859-8-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2023-10-09 11:39:08 -07:00 committed by Namhyung Kim
parent 319d459898
commit e237213670
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/util/env.c
View File

@ -457,7 +457,7 @@ const char *perf_env__cpuid(struct perf_env *env)
{
int status;
if (!env || !env->cpuid) { /* Assume local operation */
if (!env->cpuid) { /* Assume local operation */
status = perf_env__read_cpuid(env);
if (status)
return NULL;
@ -470,7 +470,7 @@ int perf_env__nr_pmu_mappings(struct perf_env *env)
{
int status;
if (!env || !env->nr_pmu_mappings) { /* Assume local operation */
if (!env->nr_pmu_mappings) { /* Assume local operation */
status = perf_env__read_pmu_mappings(env);
if (status)
return 0;
@ -483,7 +483,7 @@ const char *perf_env__pmu_mappings(struct perf_env *env)
{
int status;
if (!env || !env->pmu_mappings) { /* Assume local operation */
if (!env->pmu_mappings) { /* Assume local operation */
status = perf_env__read_pmu_mappings(env);
if (status)
return NULL;