Revert "ubsan: enable for all*config builds"

This reverts commit d0a3ac549f as it
breaks allmodconfig builds on clang.

Cc: Kees Cook <keescook@chromium.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: George Popescu <georgepope@android.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marco Elver <elver@google.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ia7c51274268d1a64ed19837825a5fb1debaaeea1

arch/powerpc/kernel/vmlinux.lds.S

@@ -313,10 +313,6 @@ SECTIONS
 #else
 	.data : AT(ADDR(.data) - LOAD_OFFSET) {
 		DATA_DATA
-#ifdef CONFIG_UBSAN
-		*(.data..Lubsan_data*)
-		*(.data..Lubsan_type*)
-#endif
 		*(.data.rel*)
 		*(.toc1)
 		*(.branch_lt)

lib/Kconfig.ubsan

@@ -160,7 +160,7 @@ config UBSAN_ENUM
 config UBSAN_ALIGNMENT
 	bool "Perform checking for misaligned pointer usage"
 	default !HAVE_EFFICIENT_UNALIGNED_ACCESS
-	depends on !UBSAN_TRAP && !COMPILE_TEST
+	depends on !UBSAN_TRAP
 	depends on $(cc-option,-fsanitize=alignment)
 	help
 	  This option enables the check of unaligned memory accesses.
@@ -170,6 +170,7 @@ config UBSAN_ALIGNMENT
 config UBSAN_SANITIZE_ALL
 	bool "Enable instrumentation for the entire kernel"
 	depends on ARCH_HAS_UBSAN_SANITIZE_ALL
+	depends on !COMPILE_TEST
 	default y
 	help
 	  This option activates instrumentation for the entire kernel.