kernel: x86/bhi: Avoid warning in #DB handler due to BHI mitigation

A denial of service vulnerability was found in the Linux kernel. When BHI mitigation is enabled, if SYSENTER is invoked with the TF flag set, then entrySYSENTERcompat uses CLEARBRANCHHISTORY and calls the clearbhbloop before the TF flag is cleared. This causes the DB handler excdebugkernel to iss...

kernel: x86/bhi: Avoid warning in #DB handler due to BHI mitigation

A denial of service vulnerability was found in the Linux kernel. When BHI mitigation is enabled, if SYSENTER is invoked with the TF flag set, then entrySYSENTERcompat uses CLEARBRANCHHISTORY and calls the clearbhbloop before the TF flag is cleared. This causes the DB handler excdebugkernel to iss...