btrfs: move leak debug code to functions
Clean up the leak debugging in extent_io.c by moving
the debug code into functions. This also removes the
list_heads used for debugging from the extent_buffer
and extent_state structures when debug is not enabled.
Since we need a global debug config to do that last
part, implement CONFIG_BTRFS_DEBUG to accommodate.
Thanks to Dave Sterba for the Kconfig bit.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index 0f5374c..2b3b832 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -63,3 +63,12 @@
If unsure, say N.
+config BTRFS_DEBUG
+ bool "Btrfs debugging support"
+ depends on BTRFS_FS
+ help
+ Enable run-time debugging support for the btrfs filesystem. This may
+ enable additional and expensive checks with negative impact on
+ performance, or export extra information via sysfs.
+
+ If unsure, say N.