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Commit 058a457e authored by Miao Xie's avatar Miao Xie Committed by Chris Mason
Browse files

Btrfs: fix remap_file_pages error 



when we use remap_file_pages() to remap a file, remap_file_pages always return
error. It is because btrfs didn't set VM_CAN_NONLINEAR for vma.

Signed-off-by: default avatarMiao Xie <miaox@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 0e4dcbef

fs/btrfs/file.c

+8 −1
Original line number Diff line number Diff line
@@ -1189,8 +1189,15 @@ static const struct vm_operations_struct btrfs_file_vm_ops = { 


static int btrfs_file_mmap(struct file	*filp, struct vm_area_struct *vma)

{

	vma->vm_ops = &btrfs_file_vm_ops;

	struct address_space *mapping = filp->f_mapping;



	if (!mapping->a_ops->readpage)

		return -ENOEXEC;



	file_accessed(filp);

	vma->vm_ops = &btrfs_file_vm_ops;

	vma->vm_flags |= VM_CAN_NONLINEAR;



	return 0;

}