diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/Makefile
index 8834dfe9d727..368759f81708 100644
--- a/arch/powerpc/kernel/vdso/Makefile
+++ b/arch/powerpc/kernel/vdso/Makefile
@@ -62,6 +62,12 @@ CC32FLAGSREMOVE += -fno-stack-clash-protection
 # 32-bit one. clang validates the values passed to these arguments during
 # parsing, even when -fno-stack-protector is passed afterwards.
 CC32FLAGSREMOVE += -mstack-protector-guard%
+# ftrace is disabled for the vdso but arch/powerpc/Makefile adds this define to
+# KBUILD_CPPFLAGS, which enables use of the 'patchable_function_entry'
+# attribute in the 'inline' define via 'notrace'. This attribute is not
+# supported for the powerpcle target, resulting in many instances of
+# -Wunknown-attributes.
+CC32FLAGSREMOVE += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
 endif
 LD32FLAGS := -Wl,-soname=linux-vdso32.so.1
 AS32FLAGS := -D__VDSO32__