diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/kernel/paravirt.c | 1 | ||||
| -rw-r--r-- | arch/i386/kernel/process.c | 25 |
2 files changed, 18 insertions, 8 deletions
diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c index 7329ec9fcc9..4dfdac4550d 100644 --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -545,6 +545,7 @@ struct paravirt_ops paravirt_ops = { .apic_write_atomic = native_apic_write_atomic, .apic_read = native_apic_read, #endif + .set_lazy_mode = (void *)native_nop, .flush_tlb_user = native_flush_tlb, .flush_tlb_kernel = native_flush_tlb_global, diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c index 23ae198dbbc..cfae587bf7d 100644 --- a/arch/i386/kernel/process.c +++ b/arch/i386/kernel/process.c @@ -670,14 +670,6 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas load_TLS(next, cpu); /* - * Restore %gs if needed (which is common) - */ - if (prev->gs | next->gs) - loadsegment(gs, next->gs); - - write_pda(pcurrent, next_p); - - /* * Now maybe handle debug registers and/or IO bitmaps */ if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW) @@ -686,6 +678,15 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas disable_tsc(prev_p, next_p); + /* + * Leave lazy mode, flushing any hypercalls made here. + * This must be done before restoring TLS segments so + * the GDT and LDT are properly updated, and must be + * done before math_state_restore, so the TS bit is up + * to date. + */ + arch_leave_lazy_cpu_mode(); + /* If the task has used fpu the last 5 timeslices, just do a full * restore of the math state immediately to avoid the trap; the * chances of needing FPU soon are obviously high now @@ -693,6 +694,14 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas if (next_p->fpu_counter > 5) math_state_restore(); + /* + * Restore %gs if needed (which is common) + */ + if (prev->gs | next->gs) + loadsegment(gs, next->gs); + + write_pda(pcurrent, next_p); + return prev_p; } |