Hi Theodore,

After merging the random tree, today's linux-next build (arm
multi_v7_defconfig) produced this warning:

lib/vsprintf.c:1668:13: warning: 'have_filled_random_ptr_key' defined but not used [-Wunused-variable]
 static bool have_filled_random_ptr_key __read_mostly;
             ^~~~~~~~~~~~~~~~~~~~~~~~~~

Introduced by commit

  bfe80ed3d7c7 ("vsprintf: add command line option debug_boot_weak_hash")

-- 
Cheers,
Stephen Rothwell