From: Zhang Zhen <zhenzhang.zhang@huawei.com>
Date: Tue, 15 Jul 2014 13:56:19 +0000 (-0400)
Subject: ext4: remove readpage() check in ext4_mmap_file()
X-Git-Tag: firefly_0821_release~176^2~3487^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=590a141863f726216d452f26bdcc59d648fd7cb0;p=firefly-linux-kernel-4.4.55.git

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 8695f70af1ef..aca7b24a4432 100644
--- 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;