sched/core: Annotate curr pointer in rq with __rcu

This patch fixes the following sparse warnings in sched/core.c
and sched/membarrier.c:

  kernel/sched/core.c:2372:27: error: incompatible types in comparison expression
  kernel/sched/core.c:4061:17: error: incompatible types in comparison expression
  kernel/sched/core.c:6067:9: error: incompatible types in comparison expression
  kernel/sched/membarrier.c:108:21: error: incompatible types in comparison expression
  kernel/sched/membarrier.c:177:21: error: incompatible types in comparison expression
  kernel/sched/membarrier.c:243:21: error: incompatible types in comparison expression

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200201125803.20245-1-madhuparnabhowmik10@gmail.com

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 5876e6b..9ea6478 100644 (file)
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -896,7 +896,7 @@ struct rq {
         */
        unsigned long           nr_uninterruptible;
 
-       struct task_struct      *curr;
+       struct task_struct __rcu        *curr;
        struct task_struct      *idle;
        struct task_struct      *stop;
        unsigned long           next_balance;