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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: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Miao Xie 2010-05-20 07:21:50 +00:00 committed by Chris Mason
parent 0e4dcbef1c
commit 058a457ef0
1 changed files with 8 additions and 1 deletions
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9
fs/btrfs/file.c
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@ -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;
}