rcu: Do tiny cleanups in rcutiny

[~andy/linux] / mm / filemap.c

diff --git a/mm/filemap.c b/mm/filemap.c
index bcc7372aebbc4375d0763e4f3acd8d096bcb612d..ef169f37156da22cc3f07d5dd9092dea00315b7f 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -58,7 +58,7 @@
 /*
  * Lock ordering:
  *
- *  ->i_mmap_lock              (vmtruncate)
+ *  ->i_mmap_lock              (truncate_pagecache)
  *    ->private_lock           (__free_pte->__set_page_dirty_buffers)
  *      ->swap_lock            (exclusive_swap_page, others)
  *        ->mapping->tree_lock
@@ -104,6 +104,10 @@
  *
  *  ->task->proc_lock
  *    ->dcache_lock            (proc_pid_lookup)
+ *
+ *  (code doesn't rely on that order, so you could switch it around)
+ *  ->tasklist_lock             (memory_failure, collect_procs_ao)
+ *    ->i_mmap_lock
  */
 
 /*
@@ -1607,7 +1611,7 @@ page_not_uptodate:
 }
 EXPORT_SYMBOL(filemap_fault);
 
-struct vm_operations_struct generic_file_vm_ops = {
+const struct vm_operations_struct generic_file_vm_ops = {
        .fault          = filemap_fault,
 };