On 08/20/2011 09:34 AM, Liu Bo wrote:
> When doing div operation of u64 type, we need to be careful and use do_div
> to avoid compile ERROR on 32bit box:
>
> "ERROR: "__udivdi3" [fs/btrfs/btrfs.ko] undefined!
> make[1]: *** [__modpost] Error 1
>
Sorry, guys, I just sent a wrong version.
Plz ignore this one. I'm sorry.
thanks,
liubo
> Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com>
> ---
> fs/btrfs/extent-tree.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index 80d6148..9b495ce 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -6796,14 +6796,14 @@ int btrfs_can_relocate(struct btrfs_root *root, u64
> bytenr)
> index = get_block_group_index(block_group);
> if (index == 0) {
> dev_min = 4;
> - min_free /= 2;
> + do_div(min_free, 2);
> } else if (index == 1) {
> dev_min = 2;
> } else if (index == 2) {
> min_free *= 2;
> } else if (index == 3) {
> dev_min = fs_devices->rw_devices;
> - min_free /= dev_min;
> + do_div(min_free, dev_min);
> }
>
> mutex_lock(&root->fs_info->chunk_mutex);
--
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