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| author | Miao Xie <miaox@cn.fujitsu.com> | 2010-05-20 11:21:50 +0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-06-11 19:46:12 +0400 |
| commit | 058a457ef0ce28d595af53d6103db73332383cbc (patch) | |
| tree | 7f17117d57c90839cd6d50e588cba0bca97a0de6 | |
| parent | 0e4dcbef1c0c3e29f9c7f824359445d385b2649a (diff) | |
| download | linux-058a457ef0ce28d595af53d6103db73332383cbc.tar.xz | |
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>
| -rw-r--r-- | fs/btrfs/file.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index abcb91867b56..ce0cd29efa9e 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -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; } |