1 files changed, 4 insertions, 4 deletions

diff --git a/fs/open.c b/fs/open.c
index b6542516a0ca..2fac58c51910 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -24,6 +24,7 @@
 #include <linux/personality.h>
 #include <linux/pagemap.h>
 #include <linux/syscalls.h>
+#include <linux/rcupdate.h>
 
 #include <asm/unistd.h>
 
@@ -930,9 +931,8 @@ void fastcall fd_install(unsigned int fd, struct file * file)
         struct fdtable *fdt;
         spin_lock(&files->file_lock);
         fdt = files_fdtable(files);
-        if (unlikely(fdt->fd[fd] != NULL))
-                BUG();
-        fdt->fd[fd] = file;
+        BUG_ON(fdt->fd[fd] != NULL);
+        rcu_assign_pointer(fdt->fd[fd], file);
         spin_unlock(&files->file_lock);
 }
 
@@ -1024,7 +1024,7 @@ asmlinkage long sys_close(unsigned int fd)
         filp = fdt->fd[fd];
         if (!filp)
                 goto out_unlock;
-        fdt->fd[fd] = NULL;
+        rcu_assign_pointer(fdt->fd[fd], NULL);
         FD_CLR(fd, fdt->close_on_exec);
         __put_unused_fd(files, fd);
         spin_unlock(&files->file_lock);