path: root/arch/Kconfig
diff options
authorNathan Chancellor <>2020-11-19 13:46:56 -0700
committerMasahiro Yamada <>2020-12-01 22:45:36 +0900
commit59612b24f78a0b61fe078ec9dff2e48e9cec52c0 (patch)
tree27ef4914a69c9bc3cd88fab6d3a6f6c10d5d91d0 /arch/Kconfig
parentb8a9092330da2030496ff357272f342eb970d51b (diff)
kbuild: Hoist '--orphan-handling' into Kconfig
Currently, '--orphan-handling=warn' is spread out across four different architectures in their respective Makefiles, which makes it a little unruly to deal with in case it needs to be disabled for a specific linker version (in this case, ld.lld 10.0.1). To make it easier to control this, hoist this warning into Kconfig and the main Makefile so that disabling it is simpler, as the warning will only be enabled in a couple places (main Makefile and a couple of compressed boot folders that blow away LDFLAGS_vmlinx) and making it conditional is easier due to Kconfig syntax. One small additional benefit of this is saving a call to ld-option on incremental builds because we will have already evaluated it for CONFIG_LD_ORPHAN_WARN. To keep the list of supported architectures the same, introduce CONFIG_ARCH_WANT_LD_ORPHAN_WARN, which an architecture can select to gain this automatically after all of the sections are specified and size asserted. A special thanks to Kees Cook for the help text on this config. Link: Acked-by: Kees Cook <> Acked-by: Michael Ellerman <> (powerpc) Reviewed-by: Nick Desaulniers <> Tested-by: Nick Desaulniers <> Signed-off-by: Nathan Chancellor <> Signed-off-by: Masahiro Yamada <>
Diffstat (limited to 'arch/Kconfig')
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 56b6ccc0e32d..ba4e966484ab 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1028,6 +1028,15 @@ config HAVE_STATIC_CALL_INLINE
+ bool
+ help
+ An arch should select this symbol once all linker sections are explicitly
+ included, size-asserted, or discarded in the linker scripts. This is
+ important because we never want expected sections to be placed heuristically
+ by the linker, since the locations of such sections can change between linker
+ versions.
source "kernel/gcov/Kconfig"
source "scripts/gcc-plugins/Kconfig"