2008/3/17, Peter Teoh <[EMAIL PROTECTED]>:
> Thanks for the explanation. But my point is the C statement "continue":
>
> for (i = start_slot; i < end_slot; i++) {============> start
> of loop, "continue" therefore will come here.
> int close = 1;
>
>
> if (!parent->map_token) {
> map_extent_buffer(parent,
> btrfs_node_key_ptr_offset(i),
> sizeof(struct btrfs_key_ptr),
> &parent->map_token, &parent->kaddr,
> &parent->map_start, &parent->map_len,
> KM_USER1);
> }
Please pay attention to the fourth parameter for map_extent_buffer.
Once map_extent_buffer has been called, parent->map_token must not be
NULL.
The test 'if (!parent->map_token)' prevents map_extent_buffer from
being called again.
Regards
YZ
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