ext4: remove readpage() check in ext4_mmap_file()

There is no kind of file which does not supply a page reading function.

Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 8695f70af1ef2046c2f68a24a5ed4e195cd6dc88..aca7b24a443243c3415221edd082c71e2a1a2ce5 100644 (file)
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -200,10 +200,6 @@ static const struct vm_operations_struct ext4_file_vm_ops = {
 
 static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
-       struct address_space *mapping = file->f_mapping;
-
-       if (!mapping->a_ops->readpage)
-               return -ENOEXEC;
        file_accessed(file);
        vma->vm_ops = &ext4_file_vm_ops;
        return 0;