objtool: Remove workaround for unreachable warnings from old GCC

Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6")
bumped the minimum GCC version to 4.6 for all architectures.

This effectively reverts commit da541b20021c ("objtool: Skip unreachable
warnings for GCC 4.4 and older"), which was a workaround for GCC 4.4 or
older.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org
Link: https://lkml.kernel.org/r/1535341183-19994-1-git-send-email-yamada.masahiro@socionext.com

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 1c48572223d11fa802873af09d0990b731a74697..5a2d1c9578a0ce19d764dcc8d84740234feb58c6 100644 (file)
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -246,8 +246,6 @@ objtool_args += --no-fp
 endif
 ifdef CONFIG_GCOV_KERNEL
 objtool_args += --no-unreachable
-else
-objtool_args += $(call cc-ifversion, -lt, 0405, --no-unreachable)
 endif
 ifdef CONFIG_RETPOLINE
 ifneq ($(RETPOLINE_CFLAGS),)