[PATCH OLK-6.6 0/3] Revert syscall performance degradation patches

This patch group has about 30% impact on syscall performance.

liwei (3): Revert "x86/bugs: Replace CONFIG_SPECTRE_BHI_{ON,OFF} with CONFIG_MITIGATION_SPECTRE_BHI" Revert "x86/bugs: Remove CONFIG_BHI_MITIGATION_AUTO and spectre_bhi=auto" Revert "x86: set SPECTRE_BHI_ON as default"

Documentation/admin-guide/hw-vuln/spectre.rst | 4 ++++ .../admin-guide/kernel-parameters.txt | 3 +++ arch/x86/Kconfig | 21 ++++++++++++++++--- arch/x86/kernel/cpu/bugs.c | 10 ++++++++- 4 files changed, 34 insertions(+), 4 deletions(-)