linux-sg2042/drivers/usb/storage
Rafael J. Wysocki 8314418629 Freezer: make kernel threads nonfreezable by default
Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:02 -07:00
..
Kconfig Fix several typos in drivers/ 2006-10-03 22:31:37 +02:00
Makefile USB Storage: add rio karma eject support 2006-09-27 11:58:54 -07:00
alauda.c [PATCH] USB Storage: add alauda support 2006-01-04 13:51:42 -08:00
alauda.h [PATCH] USB Storage: add alauda support 2006-01-04 13:51:42 -08:00
datafab.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
datafab.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
debug.c [PATCH] USB: usb-storage: add debug entry for REPORT LUNS 2006-01-04 13:51:42 -08:00
debug.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
dpcm.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
dpcm.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
freecom.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
freecom.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
initializers.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
initializers.h USB Storage: add rio karma eject support 2006-09-27 11:58:54 -07:00
isd200.c [PATCH] USB: kzalloc() conversion for rest of drivers/usb 2006-03-20 14:49:59 -08:00
isd200.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
jumpshot.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
jumpshot.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
karma.c USB Storage: add rio karma eject support 2006-09-27 11:58:54 -07:00
karma.h USB Storage: add rio karma eject support 2006-09-27 11:58:54 -07:00
libusual.c libusual: change block scope variable to function scope 2007-04-27 13:28:34 -07:00
onetouch.c USB: Onetouch - switch to using input_dev->dev.parent 2007-05-22 23:45:50 -07:00
onetouch.h [PATCH] USB Storage: add support for Maxtor One-Touch button 2005-09-08 16:22:55 -07:00
protocol.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
protocol.h [PATCH] USB: drivers/usb/storage/libusual 2006-01-04 13:48:31 -08:00
scsiglue.c usb-storage: implement autosuspend 2007-07-12 16:34:43 -07:00
scsiglue.h [PATCH] USB Storage: port reset on transport error 2005-06-27 14:44:03 -07:00
sddr09.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sddr09.h [PATCH] USB Storage: cleanups of sddr09 2006-01-04 13:51:41 -08:00
sddr55.c [PATCH] USB: kzalloc for storage 2006-03-20 14:49:52 -08:00
sddr55.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
shuttle_usbat.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
shuttle_usbat.h [PATCH] USB: shuttle_usbat: Hardcode detection of HP CDRW devices 2006-06-21 15:04:10 -07:00
transport.c [PATCH] slab: remove SLAB_NOIO 2006-12-07 08:39:23 -08:00
transport.h [PATCH] USB: drivers/usb/storage/libusual 2006-01-04 13:48:31 -08:00
unusual_devs.h USB: drivers/usb/storage/unusual_devs.h whitespace cleanup 2007-07-12 16:34:41 -07:00
usb.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
usb.h USB: usb-storage: use kthread_stop() for the control thread 2007-07-12 16:34:31 -07:00