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>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 7530fdd7c982..133762aece50 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2746,7 +2746,7 @@ context_switch(struct rq *rq, struct task_struct *prev,
          * combine the page table reload and the switch backend into
          * one hypercall.
          */
-        arch_start_context_switch();
+        arch_start_context_switch(prev);
 
         if (unlikely(!mm)) {
                 next->active_mm = oldmm;