x86/paravirt: finish change from lazy cpu to context switch start/end
Impact: fix lazy context switch API
Pass the previous and next tasks into the context switch start
end calls, so that the called functions can properly access the
task state (esp in end_context_switch, in which the next task
is not yet completely current).
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 430a0e3..cf14375 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -270,20 +270,20 @@
leave_lazy(PARAVIRT_LAZY_MMU);
}
-void paravirt_enter_lazy_cpu(void)
+void paravirt_start_context_switch(struct task_struct *prev)
{
if (percpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) {
arch_leave_lazy_mmu_mode();
- set_thread_flag(TIF_LAZY_MMU_UPDATES);
+ set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES);
}
enter_lazy(PARAVIRT_LAZY_CPU);
}
-void paravirt_leave_lazy_cpu(void)
+void paravirt_end_context_switch(struct task_struct *next)
{
leave_lazy(PARAVIRT_LAZY_CPU);
- if (test_and_clear_thread_flag(TIF_LAZY_MMU_UPDATES))
+ if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES))
arch_enter_lazy_mmu_mode();
}
@@ -399,10 +399,8 @@
.set_iopl_mask = native_set_iopl_mask,
.io_delay = native_io_delay,
- .lazy_mode = {
- .enter = paravirt_nop,
- .leave = paravirt_nop,
- },
+ .start_context_switch = paravirt_nop,
+ .end_context_switch = paravirt_nop,
};
struct pv_apic_ops pv_apic_ops = {