[PATCH] vfs: use RCU_INIT_POINTER when NULLing

[Muhammad Falak R Wani]

It is always safe to use RCU_INIT_POINTER to NULL a pointer. This
results in slightly smaller/faster code.

The following semantic patch used:
<smpl>
@@
@@
- rcu_assign_pointer
+ RCU_INIT_POINTER
  (..., NULL)

</smpl>

Signed-off-by: Muhammad Falak R Wani <falakre...@gmail.com>
---
 fs/file.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/file.c b/fs/file.c
index 1fbc5c0..e027b33 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -543,7 +543,7 @@ repeat:
        /* Sanity check */
        if (rcu_access_pointer(fdt->fd[fd]) != NULL) {
                printk(KERN_WARNING "alloc_fd: slot %d not NULL!\n", fd);
-               rcu_assign_pointer(fdt->fd[fd], NULL);
+               RCU_INIT_POINTER(fdt->fd[fd], NULL);
        }
 #endif
 
@@ -644,7 +644,7 @@ int __close_fd(struct files_struct *files, unsigned fd)
        file = fdt->fd[fd];
        if (!file)
                goto out_unlock;
-       rcu_assign_pointer(fdt->fd[fd], NULL);
+       RCU_INIT_POINTER(fdt->fd[fd], NULL);
        __clear_close_on_exec(fd, fdt);
        __put_unused_fd(files, fd);
        spin_unlock(&files->file_lock);
@@ -679,7 +679,7 @@ void do_close_on_exec(struct files_struct *files)
                        file = fdt->fd[fd];
                        if (!file)
                                continue;
-                       rcu_assign_pointer(fdt->fd[fd], NULL);
+                       RCU_INIT_POINTER(fdt->fd[fd], NULL);
                        __put_unused_fd(files, fd);
                        spin_unlock(&files->file_lock);
                        filp_close(file, files);
-- 
1.9.1