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kbuild: Check for functions with ambiguous -ffunction-sections section names

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Commit 9c7dc1dd89 ("objtool: Warn on functions with ambiguous
-ffunction-sections section names") only works for drivers which are
compiled on architectures supported by objtool.

Make a script to perform the same check for all architectures.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/a6a49644a34964f7e02f3a8ce43af03e72817180.1763669451.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf
2025-11-20 12:14:20 -08:00
committed by Peter Zijlstra
parent 3186333713
commit 93863f3f85
3 changed files with 30 additions and 1 deletions
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4
scripts/Makefile.vmlinux_o
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@@ -63,11 +63,15 @@ quiet_cmd_ld_vmlinux.o = LD $@
--start-group $(KBUILD_VMLINUX_LIBS) --end-group \
$(cmd_objtool)
cmd_check_function_names = $(srctree)/scripts/check-function-names.sh $@
define rule_ld_vmlinux.o
$(call cmd_and_savecmd,ld_vmlinux.o)
$(call cmd,gen_objtooldep)
$(call cmd,check_function_names)
endef
vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed_rule,ld_vmlinux.o)