summaryrefslogtreecommitdiffstats
path: root/include/linux/blkdev.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-06-04 15:37:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-06-04 15:37:44 -0700
commitd2dd328b7f7bc6cebe167648289337755944ad2a (patch)
tree5d664a2db1ac209f7537452ddc02597972f7aa37 /include/linux/blkdev.h
parentc1518f12bab97a6d409a25aaccb02dc8895800f3 (diff)
parent1abec4fdbb142e3ccb6ce99832fae42129134a96 (diff)
downloadblackbird-op-linux-d2dd328b7f7bc6cebe167648289337755944ad2a.tar.gz
blackbird-op-linux-d2dd328b7f7bc6cebe167648289337755944ad2a.zip
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (27 commits) block: make blk_init_free_list and elevator_init idempotent block: avoid unconditionally freeing previously allocated request_queue pipe: change /proc/sys/fs/pipe-max-pages to byte sized interface pipe: change the privilege required for growing a pipe beyond system max pipe: adjust minimum pipe size to 1 page block: disable preemption before using sched_clock() cciss: call BUG() earlier Preparing 8.3.8rc2 drbd: Reduce verbosity drbd: use drbd specific ratelimit instead of global printk_ratelimit drbd: fix hang on local read errors while disconnected drbd: Removed the now empty w_io_error() function drbd: removed duplicated #includes drbd: improve usage of MSG_MORE drbd: need to set socket bufsize early to take effect drbd: improve network latency, TCP_QUICKACK drbd: Revert "drbd: Create new current UUID as late as possible" brd: support discard Revert "writeback: fix WB_SYNC_NONE writeback from umount" Revert "writeback: ensure that WB_SYNC_NONE writeback with sb pinned is sync" ...
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r--include/linux/blkdev.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 8b7f5e0914ad..09a840264d6f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1211,14 +1211,23 @@ struct work_struct;
int kblockd_schedule_work(struct request_queue *q, struct work_struct *work);
#ifdef CONFIG_BLK_CGROUP
+/*
+ * This should not be using sched_clock(). A real patch is in progress
+ * to fix this up, until that is in place we need to disable preemption
+ * around sched_clock() in this function and set_io_start_time_ns().
+ */
static inline void set_start_time_ns(struct request *req)
{
+ preempt_disable();
req->start_time_ns = sched_clock();
+ preempt_enable();
}
static inline void set_io_start_time_ns(struct request *req)
{
+ preempt_disable();
req->io_start_time_ns = sched_clock();
+ preempt_enable();
}
static inline uint64_t rq_start_time_ns(struct request *req)
OpenPOWER on IntegriCloud