[Bug target/102952] New code-gen options for retpolines and straight line speculation

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102952

--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to peterz from comment #9)
> Created attachment 51683 [details]
> kernel patch to test -mharden-sls=all
> 
> $ make O=defconfig CC=gcc-12.0.0 arch/x86/entry/common.o
> ...
> arch/x86/entry/common.o: warning: objtool: do_SYSENTER_32()+0x1b:
> unreachable instruction

Please try the v2 patch.