only regular files with FMODE_WRITE need to be on s_files

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/file_table.c b/fs/file_table.c
index b44e4c559786..322cd37626cb 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -385,6 +385,10 @@ static inline void __file_sb_list_add(struct file *file, struct super_block *sb)
  */
 void file_sb_list_add(struct file *file, struct super_block *sb)
 {
+        if (likely(!(file->f_mode & FMODE_WRITE)))
+                return;
+        if (!S_ISREG(file_inode(file)->i_mode))
+                return;
         lg_local_lock(&files_lglock);
         __file_sb_list_add(file, sb);
         lg_local_unlock(&files_lglock);
@@ -450,8 +454,6 @@ void mark_files_ro(struct super_block *sb)
 
         lg_global_lock(&files_lglock);
         do_file_list_for_each_entry(sb, f) {
-                if (!S_ISREG(file_inode(f)->i_mode))
-                       continue;
                 if (!file_count(f))
                         continue;
                 if (!(f->f_mode & FMODE_WRITE))