btrfs: remove btree_readpage (2f1d3e4b) · Commits · 戴 / test

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>

fs/btrfs/disk-io.c

+0 −6

Original line number	Diff line number	Diff line
		@@ -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,

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