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btrfs: remove btree_readpage

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There is no way for this function to be called as ->readpage() since
it's called from
generic_file_buffered_read/filemap_fault/do_read_cache_page/readhead
code. BTRFS doesn't utilize the first 3 for the btree inode and
implements it's owon readhead mechanism. So simply remove the function.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-09-14 12:37:03 +03:00 committed by David Sterba
parent bb56f02f26
commit 2f1d3e4b93
1 changed files with 0 additions and 6 deletions
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6
fs/btrfs/disk-io.c
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@ -948,11 +948,6 @@ static int btree_writepages(struct address_space *mapping,
return btree_write_cache_pages(mapping, wbc);
}
static int btree_readpage(struct file *file, struct page *page)
{
return extent_read_full_page(page, btree_get_extent, 0);
}
static int btree_releasepage(struct page *page, gfp_t gfp_flags)
{
if (PageWriteback(page) || PageDirty(page))
@ -992,7 +987,6 @@ static int btree_set_page_dirty(struct page *page)
}
static const struct address_space_operations btree_aops = {
.readpage = btree_readpage,
.writepages = btree_writepages,
.releasepage = btree_releasepage,
.invalidatepage = btree_invalidatepage,