1 files changed, 4 insertions, 2 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 8dce96c331f8..6ab0bd692968 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -650,15 +650,17 @@ static unsigned mounts_poll(struct file *file, poll_table *wait)
         struct proc_mounts *p = file->private_data;
         struct mnt_namespace *ns = p->ns;
         unsigned res = POLLIN | POLLRDNORM;
+        int cpu = get_cpu();
+        put_cpu();
 
         poll_wait(file, &ns->poll, wait);
 
-        spin_lock(&vfsmount_lock);
+        vfsmount_read_lock(cpu);
         if (p->event != ns->event) {
                 p->event = ns->event;
                 res |= POLLERR | POLLPRI;
         }
-        spin_unlock(&vfsmount_lock);
+        vfsmount_read_unlock(cpu);
 
         return res;
 }