[tip:core/rcu] powerpc: Convert hugepd_free() to use call_rcu()

[tip-bot for Paul E. McKenney]

Commit-ID:  04229110adfba984950fc0209632640a76eb1de4
Gitweb:     https://git.kernel.org/tip/04229110adfba984950fc0209632640a76eb1de4
Author:     Paul E. McKenney <paulmck at linux.ibm.com>
AuthorDate: Mon, 5 Nov 2018 16:53:13 -0800
Committer:  Paul E. McKenney <paulmck at linux.ibm.com>
CommitDate: Thu, 8 Nov 2018 21:43:20 -0800

powerpc: Convert hugepd_free() to use call_rcu()

Now that call_rcu()'s callback is not invoked until after all
preempt-disable regions of code have completed (in addition to explicitly
marked RCU read-side critical sections), call_rcu() can be used in place
of call_rcu_sched().  This commit therefore makes that change.

Signed-off-by: Paul E. McKenney <paulmck at linux.ibm.com>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: <linuxppc-dev at lists.ozlabs.org>
---
 arch/powerpc/mm/hugetlbpage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 8cf035e68378..4c01e9a01a74 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -289,7 +289,7 @@ static void hugepd_free(struct mmu_gather *tlb, void *hugepte)
 
 	(*batchp)->ptes[(*batchp)->index++] = hugepte;
 	if ((*batchp)->index == HUGEPD_FREELIST_SIZE) {
-		call_rcu_sched(&(*batchp)->rcu, hugepd_free_rcu_callback);
+		call_rcu(&(*batchp)->rcu, hugepd_free_rcu_callback);
 		*batchp = NULL;
 	}
 	put_cpu_var(hugepd_freelist_cur);