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Btrfs: remove #if 0 code

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Btrfs had some old code sitting around under #if 0, this drops it.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2009-04-27 07:29:04 -04:00
parent d6397baee4
commit b7967db75a
3 changed files with 1 additions and 188 deletions
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63
fs/btrfs/extent_io.c
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@@ -1401,69 +1401,6 @@ out:
return total_bytes;
}
#if 0
/*
* helper function to lock both pages and extents in the tree.
* pages must be locked first.
*/
static int lock_range(struct extent_io_tree *tree, u64 start, u64 end)
{
unsigned long index = start >> PAGE_CACHE_SHIFT;
unsigned long end_index = end >> PAGE_CACHE_SHIFT;
struct page *page;
int err;
while (index <= end_index) {
page = grab_cache_page(tree->mapping, index);
if (!page) {
err = -ENOMEM;
goto failed;
}
if (IS_ERR(page)) {
err = PTR_ERR(page);
goto failed;
}
index++;
}
lock_extent(tree, start, end, GFP_NOFS);
return 0;
failed:
/*
* we failed above in getting the page at 'index', so we undo here
* up to but not including the page at 'index'
*/
end_index = index;
index = start >> PAGE_CACHE_SHIFT;
while (index < end_index) {
page = find_get_page(tree->mapping, index);
unlock_page(page);
page_cache_release(page);
index++;
}
return err;
}
/*
* helper function to unlock both pages and extents in the tree.
*/
static int unlock_range(struct extent_io_tree *tree, u64 start, u64 end)
{
unsigned long index = start >> PAGE_CACHE_SHIFT;
unsigned long end_index = end >> PAGE_CACHE_SHIFT;
struct page *page;
while (index <= end_index) {
page = find_get_page(tree->mapping, index);
unlock_page(page);
page_cache_release(page);
index++;
}
unlock_extent(tree, start, end, GFP_NOFS);
return 0;
}
#endif
/*
* set the private field for a given byte offset in the tree. If there isn't
* an extent_state there already, this does nothing.