[PATCH] mm/arm64: Correct obsolete comment in do_page_fault()

[Miaohe Lin]

commit d8ed45c5dcd4 ("mmap locking API: use coccinelle to convert mmap_sem
rwsem call sites") has convertd down_read_trylock() to mmap_read_trylock().
But it forgot to update the relevant comment.

Signed-off-by: Miaohe Lin <linmiaohe at huawei.com>
---
 arch/arm64/mm/fault.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 304eef9b7d44..eaa373dab731 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -576,7 +576,7 @@ static int __kprobes do_page_fault(unsigned long far, unsigned int esr,
 		mmap_read_lock(mm);
 	} else {
 		/*
-		 * The above down_read_trylock() might have succeeded in which
+		 * The above mmap_read_trylock() might have succeeded in which
 		 * case, we'll have missed the might_sleep() from down_read().
 		 */
 		might_sleep();
-- 
2.19.1