linux-kernel - linux-next: build warnings after merge of the tomoyo tree

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Date:   Tue, 31 May 2022 10:44:24 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build warnings after merge of the tomoyo tree

Hi all,

After merging the tomoyo tree, today's linux-next build (powerpc
ppc64_defconfig) produced these warnings:

drivers/scsi/mpt3sas/mpt3sas_scsih.c: In function 'scsih_suspend':
drivers/scsi/mpt3sas/mpt3sas_scsih.c:12412:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
12412 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/scsi/qla2xxx/qla_target.c: In function 'qlt_stop_phase1':
drivers/scsi/qla2xxx/qla_target.c:1566:17: note: '#pragma message: Please avoid flushing system-wide workqueues.'
 1566 |                 flush_scheduled_work();
      |                 ^~~~~~~~~~~~~~~~~~~~
drivers/md/dm.c: In function 'local_exit':
drivers/md/dm.c:246:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
  246 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~

Introduced by commit

  48d1646a0262 ("workqueue: Wrap flush_scheduled_work() using a macro")

Also, my x86_64 allmodconfig build gained these:

drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c: In function 'cdns_mhdp_remove':
drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:2606:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
 2606 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/lontium-lt9611uxc.c: In function 'lt9611uxc_remove':
drivers/gpu/drm/bridge/lontium-lt9611uxc.c:985:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
  985 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/message/fusion/mptscsih.c: In function 'mptscsih_suspend':
drivers/message/fusion/mptscsih.c:1234:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
 1234 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/ath/ath6kl/usb.c: In function 'ath6kl_usb_flush_all':
drivers/net/wireless/ath/ath6kl/usb.c:481:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
  481 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/i915/gt/intel_execlists_submission.c:4112:
drivers/gpu/drm/i915/gt/selftest_execlists.c: In function 'wait_for_reset':
drivers/gpu/drm/i915/gt/selftest_execlists.c:88:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
   88 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_display.c: In function 'intel_modeset_driver_remove_noirq':
drivers/gpu/drm/i915/display/intel_display.c:10502:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
10502 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/scsi/qla2xxx/qla_target.c: In function 'qlt_stop_phase1':
drivers/scsi/qla2xxx/qla_target.c:1566:17: note: '#pragma message: Please avoid flushing system-wide workqueues.'
 1566 |                 flush_scheduled_work();
      |                 ^~~~~~~~~~~~~~~~~~~~
drivers/rtc/dev.c: In function 'clear_uie':
drivers/rtc/dev.c:99:25: note: '#pragma message: Please avoid flushing system-wide workqueues.'
   99 |                         flush_scheduled_work();
      |                         ^~~~~~~~~~~~~~~~~~~~
drivers/scsi/mpt3sas/mpt3sas_scsih.c: In function 'scsih_suspend':
drivers/scsi/mpt3sas/mpt3sas_scsih.c:12412:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
12412 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/md/dm.c: In function 'local_exit':
drivers/md/dm.c:246:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
  246 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/platform/surface/surface_acpi_notify.c: In function 'san_remove':
drivers/platform/surface/surface_acpi_notify.c:864:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
  864 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/rapidio/devices/tsi721.c: In function 'tsi721_remove':
drivers/rapidio/devices/tsi721.c:2944:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
 2944 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/iio/light/tsl2563.c: In function 'tsl2563_remove':
drivers/iio/light/tsl2563.c:811:9: note: '#pragma message: Please avoid flushing system-wide workqueues.'
  811 |         flush_scheduled_work();
      |         ^~~~~~~~~~~~~~~~~~~~

Linus will not be happy ...
-- 
Cheers,
Stephen Rothwell

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