[RFC PATCH v2 10/26] perf bpf: Remove unused code in libbpf

[He Kuang]

Clean up unnecessary assignments to local variable 'result.pfd', and
remove 'pfd' field in 'struct bpf_prog_prep_result' since no one else
uses it.

Signed-off-by: He Kuang <heku...@huawei.com>
---
 tools/lib/bpf/libbpf.c       | 4 ----
 tools/lib/bpf/libbpf.h       | 3 ---
 tools/perf/util/bpf-loader.c | 1 -
 3 files changed, 8 deletions(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 462e526..754e460 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -979,8 +979,6 @@ bpf_program__load(struct bpf_program *prog,
                        pr_debug("Skip loading the %dth instance of program 
'%s'\n",
                                 i, prog->section_name);
                        prog->instances.fds[i] = -1;
-                       if (result.pfd)
-                               *result.pfd = -1;
                        continue;
                }
 
@@ -994,8 +992,6 @@ bpf_program__load(struct bpf_program *prog,
                        goto out;
                }
 
-               if (result.pfd)
-                       *result.pfd = fd;
                prog->instances.fds[i] = fd;
        }
 out:
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index 722f46b..55f65de 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -125,9 +125,6 @@ struct bpf_prog_prep_result {
         */
        struct bpf_insn *new_insn_ptr;
        int new_insn_cnt;
-
-       /* If not NULL, result fd is set to it */
-       int *pfd;
 };
 
 /*
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index dcc8845..2ac73e3 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -429,7 +429,6 @@ preproc_gen_prologue(struct bpf_program *prog, int n,
 
        res->new_insn_ptr = buf;
        res->new_insn_cnt = prologue_cnt + orig_insns_cnt;
-       res->pfd = NULL;
        return 0;
 
 errout:
-- 
1.8.5.2