[PATCH, RFC 00/30] sleep_on removal
From: Arnd Bergmann
Date: Thu Jan 02 2014 - 07:10:23 EST
The functions sleep_on, sleep_on_timeout, interruptible_sleep_on
and interruptible_sleep_on_timeout have been deprecated for as
long as I can remember, and a number of people have contributed
patches in the past to remove them from various drivers.
This has recently popped up again and I decided to spend some
of my time on tracking down the last users and kill it for good.
The work is somewhat related to the BKL removal I did a couple
of years ago, since most of these drivers were using the BKL
in a way that actually made the sleep_on function safe to call.
As the BKL was converted into mutexes, the semantics changed
slightly and typically opened up a race between checking
a condition and going to sleep.
I don't have any of the hardware that I'm sending the patches
for, so it would be great if someone could test them before
they get applied. Otherwise please review very carefully.
I'm definitely happy for any patches to go into maintainer
trees right away. Obviously the final patch cannot go in
until everything else gets merged first and I suspect there
will be a series of patches for maintainerless drivers that
will go along with it.
Arnd
Arnd Bergmann (30):
ataflop: fix sleep_on races
scsi: atari_scsi: fix sleep_on race
DAC960: remove sleep_on usage
swim3: fix interruptible_sleep_on race
[media] omap_vout: avoid sleep_on race
[media] usbvision: remove bogus sleep_on_timeout
[media] radio-cadet: avoid interruptible_sleep_on race
[media] arv: fix sleep_on race
staging: serqt_usb2: don't use sleep_on
staging: gdm72xx: fix interruptible_sleep_on race
staging: panel: fix interruptible_sleep_on race
parport: fix interruptible_sleep_on race
cris: sync_serial: remove interruptible_sleep_on
tty/amiserial: avoid interruptible_sleep_on
usbserial: stop using interruptible_sleep_on
tty: synclink: avoid sleep_on race
atm: nicstar: remove interruptible_sleep_on_timeout
atm: firestream: fix interruptible_sleep_on race
isdn: pcbit: fix interruptible_sleep_on race
isdn: hisax/elsa: fix sleep_on race in elsa FSM
isdn: divert, hysdn: fix interruptible_sleep_on race
isdn: fix multiple sleep_on races
oss: msnd_pinnacle: avoid interruptible_sleep_on_timeout
oss: midibuf: fix sleep_on races
oss: vwsnd: avoid interruptible_sleep_on
oss: dmasound: kill SLEEP() macro to avoid race
oss: remove last sleep_on users
sgi-xp: open-code interruptible_sleep_on_timeout
char: nwbutton: open-code interruptible_sleep_on
sched: remove sleep_on() and friends
Documentation/DocBook/kernel-hacking.tmpl | 10 ------
arch/cris/arch-v10/drivers/sync_serial.c | 4 ++-
arch/cris/arch-v32/drivers/sync_serial.c | 4 ++-
drivers/atm/firestream.c | 4 +--
drivers/atm/nicstar.c | 13 ++++----
drivers/block/DAC960.c | 34 +++++++++----------
drivers/block/ataflop.c | 16 ++++-----
drivers/block/swim3.c | 18 ++++++----
drivers/char/nwbutton.c | 5 ++-
drivers/char/pcmcia/synclink_cs.c | 4 +--
drivers/isdn/divert/divert_procfs.c | 7 ++--
drivers/isdn/hisax/elsa.c | 9 +++--
drivers/isdn/hisax/elsa_ser.c | 3 +-
drivers/isdn/hysdn/hysdn_proclog.c | 7 ++--
drivers/isdn/i4l/isdn_common.c | 13 +++++---
drivers/isdn/pcbit/drv.c | 6 ++--
drivers/media/platform/arv.c | 4 +--
drivers/media/platform/omap/omap_vout_vrfb.c | 3 +-
drivers/media/radio/radio-cadet.c | 12 +++++--
drivers/media/usb/usbvision/usbvision.h | 4 +--
drivers/misc/sgi-xp/xpc_channel.c | 5 ++-
drivers/parport/share.c | 3 +-
drivers/scsi/atari_scsi.c | 12 +++++--
drivers/staging/gdm72xx/gdm_usb.c | 5 +--
drivers/staging/panel/panel.c | 4 +--
drivers/staging/serqt_usb2/serqt_usb2.c | 17 ++++------
drivers/tty/amiserial.c | 26 ++++++++++-----
drivers/tty/synclink.c | 4 +--
drivers/tty/synclink_gt.c | 4 +--
drivers/tty/synclinkmp.c | 4 +--
drivers/usb/serial/ch341.c | 29 +++++++++++-----
drivers/usb/serial/cypress_m8.c | 49 ++++++++++++++++++----------
drivers/usb/serial/f81232.c | 29 +++++++++++-----
drivers/usb/serial/pl2303.c | 29 +++++++++++-----
include/linux/wait.h | 11 -------
kernel/sched/core.c | 46 --------------------------
sound/oss/dmabuf.c | 14 ++++----
sound/oss/dmasound/dmasound.h | 1 -
sound/oss/dmasound/dmasound_core.c | 28 +++++++++++-----
sound/oss/midibuf.c | 18 +++++-----
sound/oss/msnd_pinnacle.c | 31 ++++++++++--------
sound/oss/sequencer.c | 16 ++++-----
sound/oss/sleep.h | 18 ++++++++++
sound/oss/swarm_cs4297a.c | 14 ++++----
sound/oss/vwsnd.c | 14 +++++---
45 files changed, 334 insertions(+), 277 deletions(-)
create mode 100644 sound/oss/sleep.h
--
1.8.3.2
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