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Subject: Re: [4.18 rc7] BUG: sleeping function called from invalid context at
 mm/slab.h:421
From: Vlastimil Babka <vbabka@suse.cz>
References: <CABXGCsNAjrwat-Fv6GQXq8uSC6uj=ke87RJt42syrfFi0vQUmg@mail.gmail.com>
 <bd7f3ea4-d9a8-e437-9936-ee4513b47ac1@suse.cz>
Message-ID: <50f14cef-9c30-7984-bef3-6da033d91483@suse.cz>
Date: Wed, 8 Aug 2018 11:05:00 +0200
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To: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>, linux-mm@kvack.org, Petr Mladek <pmladek@suse.cz>, Steven Rostedt <rostedt@goodmis.org>, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, Peter Zijlstra <peterz@infradead.org>

On 08/08/2018 11:01 AM, Vlastimil Babka wrote:
> fbcon_startup() calls kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL) so
> it tells slab it can sleep. The problem must be higher in the stack,
> CCing printk people.

Uh just noticed there was also attached dmesg which my reply converted
to inline. The first problem there is a lockdep splat.