X86_CR3_PTI_PCID_USER_BIT
#define PTI_USER_PCID_BIT X86_CR3_PTI_PCID_USER_BIT
BUILD_BUG_ON(TLB_NR_DYN_ASIDS >= (1 << X86_CR3_PTI_PCID_USER_BIT));
VM_WARN_ON_ONCE(asid & (1 << X86_CR3_PTI_PCID_USER_BIT));
ret |= 1 << X86_CR3_PTI_PCID_USER_BIT;