[PATCH 04/48] objtool/klp: Ignore __UNIQUE_ID_*() PCI stub functions

Josh Poimboeuf
2026-04-23T04:04:25Z

With Clang LTO enabled, DECLARE_PCI_FIXUP_SECTION() uses __UNIQUE_ID()
to generate uniquely named wrapper functions, which are being reported
as new functions and unnecessarily included in the patch module:

vmlinux.o: new function: __UNIQUE_ID_quirk_f0_vpd_link_661

These stub functions only exist to make the compiler happy. Just ignore
them along with any other dont_correlate() symbols. Note that
dont_correlate() already includes prefix functions.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
tools/objtool/klp-diff.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/objtool/klp-diff.c b/tools/objtool/klp-diff.c
index 36753eeba58c..ea9ccf8c4ea9 100644
--- a/tools/objtool/klp-diff.c
+++ b/tools/objtool/klp-diff.c
@@ -786,7 +786,7 @@ static int mark_changed_functions(struct elfs *e)

/* Find changed functions */
for_each_sym(e->orig, sym_orig) {
- if (!is_func_sym(sym_orig) || is_prefix_func(sym_orig))
+ if (!is_func_sym(sym_orig) || dont_correlate(sym_orig))
continue;

patched_sym = sym_orig->twin;
@@ -802,7 +802,7 @@ static int mark_changed_functions(struct elfs *e)

/* Find added functions and print them */
for_each_sym(e->patched, patched_sym) {
- if (!is_func_sym(patched_sym) || is_prefix_func(patched_sym))
+ if (!is_func_sym(patched_sym) || dont_correlate(patched_sym))
continue;

if (!patched_sym->twin) {
--
2.53.0