[PATCH 3.16 49/63] btrfs: relocation: Only remove reloc rb_trees if reloc control has been initialized

3.16.58-rc1 review patch. If anyone has any objections, please let me know. -- From: Qu Wenruo commit 389305b2aa68723c754f88d9dbd268a400e10664 upstream. Invalid reloc tree can cause kernel NULL pointer dereference when btrfs does some cleanup of the reloc roots. It turns out

[PATCH 3.16 49/63] btrfs: relocation: Only remove reloc rb_trees if reloc control has been initialized

3.16.58-rc1 review patch. If anyone has any objections, please let me know. -- From: Qu Wenruo commit 389305b2aa68723c754f88d9dbd268a400e10664 upstream. Invalid reloc tree can cause kernel NULL pointer dereference when btrfs does some cleanup of the reloc roots. It turns out