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perf bpf_map: Remove unused code

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bpf_map__fprintf is unused so delete it, the header file declaring it
and the now unused static helper functions.

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers
2026-02-07 00:24:27 -08:00
committed by Namhyung Kim
parent 2907fd820b
commit 5cd621dead
4 changed files with 0 additions and 95 deletions
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1
tools/perf/builtin-trace.c
View File

@@ -21,7 +21,6 @@
#include <bpf/libbpf.h>
#include <bpf/btf.h>
#endif
#include "util/bpf_map.h"
#include "util/rlimit.h"
#include "builtin.h"
#include "util/cgroup.h"

1
tools/perf/util/Build
View File

@@ -170,7 +170,6 @@ perf-util-y += mutex.o
perf-util-y += sharded_mutex.o
perf-util-y += intel-tpebs.o
perf-util-$(CONFIG_LIBBPF) += bpf_map.o
perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o
perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_counter_cgroup.o
perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_ftrace.o

70
tools/perf/util/bpf_map.c
View File

@@ -1,70 +0,0 @@
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
#include "util/bpf_map.h"
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
static bool bpf_map__is_per_cpu(enum bpf_map_type type)
{
return type == BPF_MAP_TYPE_PERCPU_HASH ||
type == BPF_MAP_TYPE_PERCPU_ARRAY ||
type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
}
static void *bpf_map__alloc_value(const struct bpf_map *map)
{
if (bpf_map__is_per_cpu(bpf_map__type(map)))
return malloc(round_up(bpf_map__value_size(map), 8) *
sysconf(_SC_NPROCESSORS_CONF));
return malloc(bpf_map__value_size(map));
}
int bpf_map__fprintf(struct bpf_map *map, FILE *fp)
{
void *prev_key = NULL, *key, *value;
int fd = bpf_map__fd(map), err;
int printed = 0;
if (fd < 0)
return fd;
err = -ENOMEM;
key = malloc(bpf_map__key_size(map));
if (key == NULL)
goto out;
value = bpf_map__alloc_value(map);
if (value == NULL)
goto out_free_key;
while ((err = bpf_map_get_next_key(fd, prev_key, key) == 0)) {
int intkey = *(int *)key;
if (!bpf_map_lookup_elem(fd, key, value)) {
bool boolval = *(bool *)value;
if (boolval)
printed += fprintf(fp, "[%d] = %d,\n", intkey, boolval);
} else {
printed += fprintf(fp, "[%d] = ERROR,\n", intkey);
}
prev_key = key;
}
if (err == ENOENT)
err = printed;
free(value);
out_free_key:
free(key);
out:
return err;
}

23
tools/perf/util/bpf_map.h
View File

@@ -1,23 +0,0 @@
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
#ifndef __PERF_BPF_MAP_H
#define __PERF_BPF_MAP_H 1
#include <stdio.h>
struct bpf_map;
#ifdef HAVE_LIBBPF_SUPPORT
int bpf_map__fprintf(struct bpf_map *map, FILE *fp);
#else
#include <linux/compiler.h>
static inline int bpf_map__fprintf(struct bpf_map *map __maybe_unused, FILE *fp __maybe_unused)
{
return 0;
}
#endif // HAVE_LIBBPF_SUPPORT
#endif // __PERF_BPF_MAP_H