cifs: fix confusing unneeded warning message on smb2.1 and earlier

[mirror_ubuntu-jammy-kernel.git] / fs / open.c

diff --git a/fs/open.c b/fs/open.c
index daa324606a41f8141567cf4395d26458db76a924..81b2d7c83addbcdd5e73514e8de1dbd4455d4756 100644 (file)
--- a/fs/open.c
+++ b/fs/open.c
@@ -65,6 +65,7 @@ int do_truncate(struct user_namespace *mnt_userns, struct dentry *dentry,
        inode_unlock(dentry->d_inode);
        return ret;
 }
+EXPORT_SYMBOL_GPL(do_truncate);
 
 long vfs_truncate(const struct path *path, loff_t length)
 {
@@ -856,8 +857,20 @@ static int do_dentry_open(struct file *f,
                 * of THPs into the page cache will fail.
                 */
                smp_mb();
-               if (filemap_nr_thps(inode->i_mapping))
-                       truncate_pagecache(inode, 0);
+               if (filemap_nr_thps(inode->i_mapping)) {
+                       struct address_space *mapping = inode->i_mapping;
+
+                       filemap_invalidate_lock(inode->i_mapping);
+                       /*
+                        * unmap_mapping_range just need to be called once
+                        * here, because the private pages is not need to be
+                        * unmapped mapping (e.g. data segment of dynamic
+                        * shared libraries here).
+                        */
+                       unmap_mapping_range(mapping, 0, 0, 0);
+                       truncate_inode_pages(mapping, 0);
+                       filemap_invalidate_unlock(inode->i_mapping);
+               }
        }
 
        return 0;