[RFC PATCH 25/27] lift rcu_read_lock() into reverse_path_check()

[Al Viro]

From: Al Viro <v...@zeniv.linux.org.uk>

Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
---
 fs/eventpoll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 78b8769b72dc..8a7ad752befd 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1257,7 +1257,6 @@ static int reverse_path_check_proc(struct file *file, int 
depth)
                return -1;
 
        /* CTL_DEL can remove links here, but that can't increase our count */
-       rcu_read_lock();
        hlist_for_each_entry_rcu(epi, &file->f_ep_links, fllink) {
                struct file *recepient = epi->ep->file;
                if (WARN_ON(!is_file_epoll(recepient)))
@@ -1269,7 +1268,6 @@ static int reverse_path_check_proc(struct file *file, int 
depth)
                if (error != 0)
                        break;
        }
-       rcu_read_unlock();
        return error;
 }
 
@@ -1291,7 +1289,9 @@ static int reverse_path_check(void)
        /* let's call this for all tfiles */
        list_for_each_entry(current_file, &tfile_check_list, f_tfile_llink) {
                path_count_init();
+               rcu_read_lock();
                error = reverse_path_check_proc(current_file, 0);
+               rcu_read_unlock();
                if (error)
                        break;
        }
-- 
2.11.0