Re: [PATCH] arm64: lse: remove -fcall-used-x0 flag

On Mon, Oct 29, 2018 at 10:10:26AM -0700, ndesaulniers@google.com wrote:

From: Tri Vo trong@android.com

commit 2a6c7c367de82951c98a290a21156770f6f82c84 upstream

x0 is not callee-saved in the PCS. So there is no need to specify -fcall-used-x0.

Clang doesn't currently support -fcall-used flags. This patch will help building the kernel with clang.

Tested-by: Nick Desaulniers ndesaulniers@google.com Acked-by: Will Deacon will.deacon@arm.com Signed-off-by: Tri Vo trong@android.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Nick Desaulniers ndesaulniers@google.com

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Sending to stable for inclusion in 4.14. Needed for CONFIG_ARM64_LSE_ATOMICS.

Now queued up, and also added to 4.18.y and 4.19.y and 4.9.y

thanks,

greg k-h