Hi Greg and Sasha,
Please consider applying the following commits to 6.2 (they apply
cleanly with some fuzz for me):
db7adcfd1cec ("x86/alternatives: Introduce int3_emulate_jcc()")
ac0ee0a9560c ("x86/alternatives: Teach text_poke_bp() to patch Jcc.d32 instructions")
923510c88d2b ("x86/static_call: Add support for Jcc tail-calls")
I have attached backports to 6.1.
Without these changes, kernels built with any version of clang using -Os
or clang 17.0.0 (tip of tree) at any kernel-supported optimization level
do not boot. This has been tested by people affected by this problem,
see https://github.com/ClangBuiltLinux/linux/issues/1774 for more info.
If there are any problems, please let me know.
Cheers,
Nathan
Attachment:
clang-jcc-series-6.1.mbox
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