Tejun Heo f2dbd76a0a block, cfq: replace current_io_context() with create_io_context() ...

When called under queue_lock, current_io_context() triggers lockdep
warning if it hits allocation path.  This is because io_context
installation is protected by task_lock which is not IRQ safe, so it
triggers irq-unsafe-lock -> irq -> irq-safe-lock -> irq-unsafe-lock
deadlock warning.

Given the restriction, accessor + creator rolled into one doesn't work
too well.  Drop current_io_context() and let the users access
task->io_context directly inside queue_lock combined with explicit
creation using create_io_context().

Future ioc updates will further consolidate ioc access and the create
interface will be unexported.

While at it, relocate ioc internal interface declarations in blk.h and
add section comments before and after.

This patch does not introduce functional change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2011-12-14 00:33:40 +01:00

..

blk-cgroup.c

block, cfq: unlink cfq_io_context's immediately

2011-12-14 00:33:39 +01:00

blk-cgroup.h

block: fix a typo in the blk-cgroup.h file

2011-10-24 16:08:38 +02:00

blk-core.c

block, cfq: replace current_io_context() with create_io_context()

2011-12-14 00:33:40 +01:00

blk-exec.c

block: add missing blk_queue_dead() checks

2011-12-14 00:33:37 +01:00

blk-flush.c

blk-flush: move the queue kick into

2011-10-24 16:24:31 +02:00

blk-integrity.c

block: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros

2011-10-31 19:31:12 -04:00

blk-ioc.c

block, cfq: replace current_io_context() with create_io_context()

2011-12-14 00:33:40 +01:00

blk-iopoll.c

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

blk-lib.c

block: fix patch import error in max_discard_sectors check

2011-07-23 20:34:59 +02:00

blk-map.c

block: Always check length of all iov entries in blk_rq_map_user_iov()

2011-11-13 19:58:09 +01:00

blk-merge.c

block: attempt to merge with existing requests on plug flush

2011-03-21 10:14:27 +01:00

blk-settings.c

block: Fix discard topology stacking and reporting

2011-05-18 10:37:35 +02:00

blk-softirq.c

block: Don't check QUEUE_FLAG_SAME_COMP in __blk_complete_request

2011-09-14 09:31:01 +02:00

blk-sysfs.c

block, cfq: move cfqd->cic_index to q->id

2011-12-14 00:33:37 +01:00

blk-tag.c

block: warn if tag is greater than real_max_depth.

2011-10-25 10:20:05 +02:00

blk-throttle.c

block: add blk_queue_dead()

2011-12-14 00:33:37 +01:00

blk-timeout.c

fault-injection: add ability to export fault_attr in arbitrary directory

2011-08-03 14:25:20 -10:00

blk.h

block, cfq: replace current_io_context() with create_io_context()

2011-12-14 00:33:40 +01:00

bsg-lib.c

block: Change module.h -> export.h in bsg-lib.c

2011-10-31 19:31:13 -04:00

bsg.c

block: misc updates to blk_get_queue()

2011-12-14 00:33:38 +01:00

cfq-iosched.c

block, cfq: replace current_io_context() with create_io_context()

2011-12-14 00:33:40 +01:00

cfq.h

blk-cgroup: Add unaccounted time to timeslice_used.

2011-03-12 16:54:00 +01:00

compat_ioctl.c

compat_ioctl: fix warning caused by qemu

2011-07-01 22:32:26 +02:00

deadline-iosched.c

iosched: prevent aliased requests from starving other I/O

2011-06-02 21:19:05 +02:00

elevator.c

block, cfq: remove delayed unlink

2011-12-14 00:33:39 +01:00

genhd.c

block: misc updates to blk_get_queue()

2011-12-14 00:33:38 +01:00

ioctl.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

Kconfig

block: add bsg helper library

2011-07-31 22:05:09 +02:00

Kconfig.iosched

blk-cgroup: config options re-arrangement

2010-04-26 19:27:56 +02:00

Makefile

block: add bsg helper library

2011-07-31 22:05:09 +02:00

noop-iosched.c

block: remove per-queue plugging

2011-03-10 08:52:07 +01:00

scsi_ioctl.c

block: drop unnecessary blk_get/put_queue() in scsi_cmd_ioctl() and blk_get_tg()

2011-10-19 14:31:25 +02:00