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authorJosh Poimboeuf <jpoimboe@redhat.com>2022-04-18 09:50:39 -0700
committerPeter Zijlstra <peterz@infradead.org>2022-04-22 12:32:04 +0200
commit4ab7674f5951ac6a8ac4fa8828090edb64a4771f (patch)
treeacd05dfd8faea515ddc411501bd25627da4cd148 /arch/Kconfig
parent26e176896a5bb9222ae3433da902edd2566a61a4 (diff)
objtool: Make jump label hack optional
Objtool secretly does a jump label hack to overcome the limitations of the toolchain. Make the hack explicit (and optional for other arches) by turning it into a cmdline option and kernel config option. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Link: https://lkml.kernel.org/r/3bdcbfdd27ecb01ddec13c04bdf756a583b13d24.1650300597.git.jpoimboe@redhat.com
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 04cdef16db24..9dce6d6e3bc3 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -46,6 +46,7 @@ config JUMP_LABEL
bool "Optimize very unlikely/likely branches"
depends on HAVE_ARCH_JUMP_LABEL
depends on CC_HAS_ASM_GOTO
+ select OBJTOOL if HAVE_JUMP_LABEL_HACK
help
This option enables a transparent branch optimization that
makes certain almost-always-true or almost-always-false branch
@@ -1031,6 +1032,9 @@ config ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
config HAVE_OBJTOOL
bool
+config HAVE_JUMP_LABEL_HACK
+ bool
+
config HAVE_STACK_VALIDATION
bool
help