libbpf: Remove unused args in parse_usdt_note

Remove unused 'elf' and 'path' parameters from parse_usdt_note function
signature. These parameters are not referenced within the function body
and only add unnecessary complexity.

The function only requires the note header, data buffer, offsets, and
output structure to perform USDT note parsing.

Update function declaration, definition, and the single call site in
collect_usdt_targets() to match the simplified signature.

This is a safe internal cleanup as parse_usdt_note is a static function.

Signed-off-by: Jiawei Zhao <phoenix500526@163.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20250904030525.1932293-1-phoenix500526@163.com

diff --git a/tools/lib/bpf/usdt.c b/tools/lib/bpf/usdt.c
index 867bff6b06990e6aba7acd05d9f10acec0d119fb..fc2785eecc1776d9c3ccd9f9257084193a44b7d2 100644 (file)
--- a/tools/lib/bpf/usdt.c
+++ b/tools/lib/bpf/usdt.c
@@ -581,9 +581,8 @@ static struct elf_seg *find_vma_seg(struct elf_seg *segs, size_t seg_cnt, long o
        return NULL;
 }
 
-static int parse_usdt_note(Elf *elf, const char *path, GElf_Nhdr *nhdr,
-                          const char *data, size_t name_off, size_t desc_off,
-                          struct usdt_note *usdt_note);
+static int parse_usdt_note(GElf_Nhdr *nhdr, const char *data, size_t name_off,
+                          size_t desc_off, struct usdt_note *usdt_note);
 
 static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, __u64 usdt_cookie);
 
@@ -637,7 +636,7 @@ static int collect_usdt_targets(struct usdt_manager *man, Elf *elf, const char *
                struct elf_seg *seg = NULL;
                void *tmp;
 
-               err = parse_usdt_note(elf, path, &nhdr, data->d_buf, name_off, desc_off, &note);
+               err = parse_usdt_note(&nhdr, data->d_buf, name_off, desc_off, &note);
                if (err)
                        goto err_out;
 
@@ -1143,8 +1142,7 @@ err_out:
 /* Parse out USDT ELF note from '.note.stapsdt' section.
  * Logic inspired by perf's code.
  */
-static int parse_usdt_note(Elf *elf, const char *path, GElf_Nhdr *nhdr,
-                          const char *data, size_t name_off, size_t desc_off,
+static int parse_usdt_note(GElf_Nhdr *nhdr, const char *data, size_t name_off, size_t desc_off,
                           struct usdt_note *note)
 {
        const char *provider, *name, *args;