This reverts commit a992c387.

The support for deferred printing was removed in v5.10-rc1-rt1 by commit
9153e3c5cb0c9 ("printk: remove deferred printing") because:

    Since printing occurs either atomically or from the printing
    kthread, there is no need for any deferring or tracking possible
    recursion paths. Remove all printk context tracking.

Also, disabling interrupts in __build_all_zonelists() should produce warnings
once that code path is hit.

Fixes: a992c387 ("mm/page_alloc: fix potential deadlock on zonelist_update_seq seqlock")
Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>