From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
DRI Development <dri-devel@lists.freedesktop.org>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
Daniel Vetter <daniel.vetter@intel.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Hans de Goede <hdegoede@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kees Cook <keescook@chromium.org>,
Nicolas Pitre <nicolas.pitre@linaro.org>
Subject: [PATCH 01/33] dummycon: Sprinkle locking checks
Date: Fri, 24 May 2019 10:53:22 +0200 [thread overview]
Message-ID: <20190524085354.27411-2-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <20190524085354.27411-1-daniel.vetter@ffwll.ch>
As part of trying to understand the locking (or lack thereof) in the
fbcon/vt/fbdev maze, annotate everything.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
---
drivers/video/console/dummycon.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index 45ad925ad5f8..2352b4c37826 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -33,6 +33,8 @@ static bool dummycon_putc_called;
void dummycon_register_output_notifier(struct notifier_block *nb)
{
+ WARN_CONSOLE_UNLOCKED();
+
raw_notifier_chain_register(&dummycon_output_nh, nb);
if (dummycon_putc_called)
@@ -41,11 +43,15 @@ void dummycon_register_output_notifier(struct notifier_block *nb)
void dummycon_unregister_output_notifier(struct notifier_block *nb)
{
+ WARN_CONSOLE_UNLOCKED();
+
raw_notifier_chain_unregister(&dummycon_output_nh, nb);
}
static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos)
{
+ WARN_CONSOLE_UNLOCKED();
+
dummycon_putc_called = true;
raw_notifier_call_chain(&dummycon_output_nh, 0, NULL);
}
--
2.20.1
next prev parent reply other threads:[~2019-05-24 8:54 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-24 8:53 [PATCH 00/33] fbcon notifier begone! Daniel Vetter
2019-05-24 8:53 ` Daniel Vetter [this message]
2019-05-24 8:53 ` [PATCH 02/33] fbdev: locking check for fb_set_suspend Daniel Vetter
2019-05-24 8:53 ` [PATCH 03/33] vt: might_sleep() annotation for do_blank_screen Daniel Vetter
2019-05-24 8:53 ` [PATCH 04/33] vt: More locking checks Daniel Vetter
2019-05-27 7:08 ` Daniel Vetter
2019-05-27 7:22 ` Greg Kroah-Hartman
2019-05-24 8:53 ` [PATCH 05/33] fbdev/sa1100fb: Remove dead code Daniel Vetter
2019-05-24 8:53 ` [PATCH 06/33] fbdev/cyber2000: Remove struct display Daniel Vetter
2019-05-24 8:53 ` [PATCH 07/33] fbdev/aty128fb: Remove dead code Daniel Vetter
2019-05-24 8:53 ` [PATCH 08/33] fbcon: s/struct display/struct fbcon_display/ Daniel Vetter
2019-05-24 8:53 ` [PATCH 09/33] fbcon: Remove fbcon_has_exited Daniel Vetter
2019-05-25 15:38 ` Sam Ravnborg
2019-05-27 6:10 ` Daniel Vetter
2019-05-27 6:51 ` Sam Ravnborg
2019-05-24 8:53 ` [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly Daniel Vetter
2019-05-24 8:53 ` [PATCH 11/33] fbdev/sh_mobile: remove sh_mobile_lcdc_display_notify Daniel Vetter
2019-05-25 15:01 ` Sam Ravnborg
2019-05-27 6:13 ` Daniel Vetter
2019-05-27 6:52 ` Sam Ravnborg
2019-05-24 8:53 ` [PATCH 12/33] fbdev/omap: sysfs files can't disappear before the device is gone Daniel Vetter
2019-05-24 8:53 ` [PATCH 13/33] fbdev: " Daniel Vetter
2019-05-24 8:53 ` [PATCH 14/33] staging/olpc: lock_fb_info can't fail Daniel Vetter
2019-05-27 7:10 ` Daniel Vetter
2019-05-27 7:22 ` Greg KH
2019-05-24 8:53 ` [PATCH 15/33] fbdev/atyfb: " Daniel Vetter
2019-05-24 8:53 ` [PATCH 16/33] fbdev: lock_fb_info cannot fail Daniel Vetter
2019-05-24 8:53 ` [PATCH 17/33] fbcon: call fbcon_fb_bind directly Daniel Vetter
2019-05-24 8:53 ` [PATCH 18/33] fbdev: make unregister/unlink functions not fail Daniel Vetter
2019-05-24 8:53 ` [PATCH 19/33] fbdev: unify unlink_framebuffer paths Daniel Vetter
2019-05-24 8:53 ` [PATCH 20/33] fbdev/sh_mob: Remove fb notifier callback Daniel Vetter
2019-05-24 8:53 ` [PATCH 21/33] fbdev: directly call fbcon_suspended/resumed Daniel Vetter
2019-05-24 8:53 ` [PATCH 22/33] fbcon: Call fbcon_mode_deleted/new_modelist directly Daniel Vetter
2019-05-24 8:53 ` [PATCH 23/33] fbdev: Call fbcon_get_requirement directly Daniel Vetter
2019-05-24 8:53 ` [PATCH 24/33] Revert "backlight/fbcon: Add FB_EVENT_CONBLANK" Daniel Vetter
2019-05-24 13:14 ` Daniel Thompson
2019-05-24 15:28 ` Daniel Vetter
2019-05-27 10:59 ` Bartlomiej Zolnierkiewicz
2019-05-24 8:53 ` [PATCH 25/33] fbmem: pull fbcon_fb_blanked out of fb_blank Daniel Vetter
2019-05-25 17:00 ` Sam Ravnborg
2019-05-24 8:53 ` [PATCH 26/33] fbdev: remove FBINFO_MISC_USEREVENT around fb_blank Daniel Vetter
2019-05-24 8:53 ` [PATCH 27/33] fb: Flatten control flow in fb_set_var Daniel Vetter
2019-05-24 8:53 ` [PATCH 28/33] fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls Daniel Vetter
2019-05-24 8:53 ` [PATCH 29/33] vgaswitcheroo: call fbcon_remap_all directly Daniel Vetter
2019-05-24 8:53 ` [PATCH 30/33] fbcon: Call con2fb_map functions directly Daniel Vetter
2019-05-24 8:53 ` [PATCH 31/33] fbcon: Document what I learned about fbcon locking Daniel Vetter
2019-05-24 8:53 ` [PATCH 32/33] staging/olpc_dcon: Add drm conversion to TODO Daniel Vetter
2019-05-27 7:11 ` Daniel Vetter
2019-05-27 7:22 ` Greg KH
2019-05-24 8:53 ` [PATCH 33/33] backlight: simplify lcd notifier Daniel Vetter
2019-05-25 17:19 ` [PATCH 00/33] fbcon notifier begone! Sam Ravnborg
2019-05-27 7:17 ` Daniel Vetter
2019-05-27 11:56 ` Daniel Vetter
-- strict thread matches above, loose matches on Subject: below --
2019-05-28 9:02 [PATCH 00/33] fbcon notifier begone v3! Daniel Vetter
2019-05-28 9:02 ` [PATCH 01/33] dummycon: Sprinkle locking checks Daniel Vetter
2019-05-20 8:21 [PATCH 00/33] fbcon notifier begone! Daniel Vetter
2019-05-20 8:21 ` [PATCH 01/33] dummycon: Sprinkle locking checks Daniel Vetter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190524085354.27411-2-daniel.vetter@ffwll.ch \
--to=daniel.vetter@ffwll.ch \
--cc=b.zolnierkie@samsung.com \
--cc=daniel.vetter@intel.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=gregkh@linuxfoundation.org \
--cc=hdegoede@redhat.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=keescook@chromium.org \
--cc=linux-kernel@vger.kernel.org \
--cc=nicolas.pitre@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).