On Sun, Sep 29, 2019 at 11:32:06AM -0700, Nathan Chancellor wrote:
> Commit a9d57ef15cbe ("x86/retpolines: Disable switch jump tables when
> retpolines are enabled") added -fno-jump-tables to workaround a GCC issue
> while deliberately avoiding adding this flag when CONFIG_CC_IS_CLANG is
> set, which is defined by the kconfig system when CC=clang is provided.
>
> However, this symbol was added in 4.18 in commit 469cb7376c06 ("kconfig:
> add CC_IS_CLANG and CLANG_VERSION") so it is always undefined in 4.14,
> meaning -fno-jump-tables gets added when using Clang.
>
> Fix this up by using the equivalent $(cc-name) comparison, which matches
> what upstream did until commit 076f421da5d4 ("kbuild: replace cc-name
> test with CONFIG_CC_IS_CLANG").
>
> Fixes: e28951100515 ("x86/retpolines: Disable switch jump tables when retpolines are enabled")
> Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> ---
> arch/x86/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Now queued up, thanks!
greg k-h
