How to remove kernel message log "random: get_random_u32 called from allocate_slab"?

[Dongliang Mu]

Hi all,

I compiled the current upstream Linux kernel with "make allyesconfig".
The boot messages are full of the following lines:

random: get_random_u32 called from allocate_slab with crng_init=0
random: get_random_u32 called from allocate_slab with crng_init=0
random: get_random_u32 called from allocate_slab with crng_init=0
......
random: get_random_u32 called from allocate_slab with crng_init=0

It seems CONFIG_PRINTK_INDEX can help reduce such boot messages. But
the message still occurs. Anyone knows which kernel config actually
controls the appearance of messages? Thanks in advance.
--
My best regards to you.

     No System Is Safe!
     Dongliang Mu