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Date:	Wed, 10 Oct 2012 17:34:50 +0200
From:	David Sterba <dave@...os.cz>
To:	zwu.kernel@...il.com
Cc:	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxram@...ux.vnet.ibm.com, viro@...iv.linux.org.uk,
	david@...morbit.com, dave@...os.cz, tytso@....edu, cmm@...ibm.com,
	Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
Subject: Re: [RFC v3 02/13] vfs: introduce private radix tree structures

On Wed, Oct 10, 2012 at 06:07:24PM +0800, zwu.kernel@...il.com wrote:
> +void hot_track_init(struct super_block *sb)
> +{
...
> +}

> +void hot_track_exit(struct super_block *sb)
> +{
> +	hot_cache_exit();
> +}

Needs to be exported if btrfs is built as a module, otherwise does not
link

  LDS     arch/x86/boot/compressed/vmlinux.lds
  AS      arch/x86/boot/compressed/head_64.o
  CC      arch/x86/boot/compressed/misc.o
  CC      arch/x86/boot/compressed/string.o
  CC      arch/x86/boot/compressed/cmdline.o
  CC      arch/x86/boot/compressed/early_serial_console.o
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
ERROR: "hot_track_init" [fs/btrfs/btrfs.ko] undefined!
ERROR: "hot_track_exit" [fs/btrfs/btrfs.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
make: *** Waiting for unfinished jobs....


david
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