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create-diff-object: Ignore kpatch_ignored functions/sections missing ftrace hook 

Some theoretically unchanged functions can have undesired changes if the
compiler decides to perform inlining in a different way (e.g. because of
newly added references). In such a case, it can be useful to discard
changes to functions that don't actually need modification.

Sadly, this currently doesn't work for functions missing the ftrace hook
(e.g. notrace code) as presence of the hook is checked before
identifying elements to ignore.

Look for functions/sections to ignore earlier.

Signed-off-by: Julien Thierry <jthierry@redhat.com>
This commit is contained in:
Julien Thierry 2020-04-22 14:13:38 +01:00
parent ebc776a4fc
commit c1caee1468
2 changed files with 3 additions and 4 deletions
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5
kpatch-build/create-diff-object.c
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@ -3666,13 +3666,12 @@ int main(int argc, char *argv[])
*/
kpatch_mark_ignored_sections(kelf_patched);
kpatch_compare_correlated_elements(kelf_patched);
kpatch_mark_ignored_functions_same(kelf_patched);
kpatch_mark_ignored_sections_same(kelf_patched);
kpatch_check_func_profiling_calls(kelf_patched);
kpatch_elf_teardown(kelf_base);
kpatch_elf_free(kelf_base);
kpatch_mark_ignored_functions_same(kelf_patched);
kpatch_mark_ignored_sections_same(kelf_patched);
kpatch_include_standard_elements(kelf_patched);
num_changed = kpatch_include_changed_functions(kelf_patched);
callbacks_exist = kpatch_include_callback_elements(kelf_patched);

2
test/unit/objs

@ -1 +1 @@
Subproject commit 34d0a61ce8dc7da23e3cb47de6a8eee30484638c
Subproject commit 42df5fbc85632c4bab836e104210fe5fd52ae1e5