> > This patch set enables the Intel flexible return and event delivery > > (FRED) architecture for x86-64. > > > > > Which tree is this based on now? > It was based on the tip master on the day I sent the v12 patch set, i.e., Monday night in the US west coast. > I tried running 'b4 diff' but it complains it can't > find some context around arch/x86/kernel/cpu/common.c . > What does it complain? > I have the tip tree updated. I just did a rebase on the latest tip master, and did find a build bug caused by: [PATCH v12 33/37] x86/entry: Add fred_entry_from_kvm() for VMX to handle IRQ/NMI as <asm/export.h> is deprecated by <linux/export.h> yesterday. After I replaced it, it compiles and boots. What should I do now? Thanks! Xin