On Mon, Oct 12, 2020 at 09:31:16AM +0100, Will Deacon wrote:

On Fri, Oct 09, 2020 at 09:13:34AM -0700, Sami Tolvanen wrote:

quoted

Allow CONFIG_LTO_CLANG and CONFIG_THINLTO to be enabled.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <redacted>
---
 arch/arm64/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index ad522b021f35..7016d193864f 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig

@@ -72,6 +72,8 @@ config ARM64
 	select ARCH_USE_SYM_ANNOTATIONS
 	select ARCH_SUPPORTS_MEMORY_FAILURE
 	select ARCH_SUPPORTS_SHADOW_CALL_STACK if CC_HAVE_SHADOW_CALL_STACK
+	select ARCH_SUPPORTS_LTO_CLANG
+	select ARCH_SUPPORTS_THINLTO

Please don't enable this for arm64 until we have the dependency stuff sorted
out. I posted patches [1] for this before, but I think they should be part
of this series as they don't make sense on their own.

Oh, hm. We've been trying to trim down this series, since it's already
quite large. Why can't [1] land first? It would make this easier to deal
with, IMO.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=rwonce/read-barrier-depends

-- 
Kees Cook

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