diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2021-06-25 00:18:23 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-07-01 15:00:03 -0300 |
| commit | 69e874db4dded0f2fe56ae623d7f54318395c87d (patch) | |
| tree | fcbf8fe8a13cbd71508aeac140d71399d86f0c94 /tools/perf/util/cgroup.h | |
| parent | f20510d552e2941df2518c73c99fa2537575dbce (diff) | |
perf tools: Add read_cgroup_id() function
The read_cgroup_id() is to read a cgroup id from a file handle using
name_to_handle_at(2) for the given cgroup. It'll be used by bperf
cgroup stat later.
Committer notes:
-int read_cgroup_id(struct cgroup *cgrp)
+static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused)
To fix the build when HAVE_FILE_HANDLE is not defined.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210625071826.608504-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cgroup.h')
| -rw-r--r-- | tools/perf/util/cgroup.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/cgroup.h b/tools/perf/util/cgroup.h index 162906f3412a..f3c978746999 100644 --- a/tools/perf/util/cgroup.h +++ b/tools/perf/util/cgroup.h @@ -2,6 +2,7 @@ #ifndef __CGROUP_H__ #define __CGROUP_H__ +#include <linux/compiler.h> #include <linux/refcount.h> #include <linux/rbtree.h> #include "util/env.h" @@ -38,4 +39,13 @@ struct cgroup *cgroup__find(struct perf_env *env, uint64_t id); void perf_env__purge_cgroups(struct perf_env *env); +#ifdef HAVE_FILE_HANDLE +int read_cgroup_id(struct cgroup *cgrp); +#else +static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused) +{ + return -1; +} +#endif /* HAVE_FILE_HANDLE */ + #endif /* __CGROUP_H__ */ |