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Message-ID: <20170628110819.70eb0ce0@gandalf.local.home>
Date: Wed, 28 Jun 2017 11:08:19 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
LKML <linux-kernel@...r.kernel.org>,
Alan Cox <alan@...rguk.ukuu.org.uk>,
Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
dri-devel@...ts.freedesktop.org,
Daniel Vetter <daniel.vetter@...el.com>
Subject: Re: [PATCH] fbcon: Make fbcon a built-time depency for fbdev
On Wed, 28 Jun 2017 12:36:35 +0200
Daniel Vetter <daniel.vetter@...ll.ch> wrote:
> There's a bunch of folks who're trying to make printk less
> contended and faster, but there's a problem: printk uses the
> console_lock, and the console lock has become the BKL for all things
> fbdev/fbcon, which in turn pulled in half the drm subsystem under that
> lock. That's awkward.
>
I applied your patch and compiled it, and got this error while
installing modules:
DEPMOD 4.12.0-rc5-test+
depmod: ERROR: Found 11 modules in dependency cycles!
depmod: ERROR: Cycle detected: fbcon -> bitblit -> softcursor -> fb -> fbcon
depmod: ERROR: Cycle detected: softcursor -> fb -> fbcon_rotate -> fbcon_ccw -> softcursor
depmod: ERROR: Cycle detected: fb -> fbcon_rotate -> fbcon_ccw -> fb
depmod: ERROR: Cycle detected: softcursor -> fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> softcursor
depmod: ERROR: Cycle detected: fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fb
depmod: ERROR: Cycle detected: softcursor -> fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fbcon_cw -> softcursor
depmod: ERROR: Cycle detected: fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fbcon_cw -> fb
depmod: ERROR: Cycle detected: fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fbcon_cw -> fb
depmod: ERROR: Cycle detected: fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fbcon_cw -> tileblit -> fb
depmod: ERROR: Cycle detected: fbcon -> bitblit -> softcursor -> fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fbcon_cw -> tileblit -> fbdev
depmod: ERROR: Cycle detected: fb -> fbcon_rotate -> fbcon_ccw -> fbcon_ud -> fbcon_cw -> tileblit -> fb
/work/git/linux-trace.git/Makefile:1251: recipe for target '_modinst_post' failed
Config attached.
Oh, and I changed CONFIG_FB to be a module, which is probably where the
error happened.
-- Steve
Download attachment "config" of type "application/octet-stream" (122059 bytes)
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