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| author | David S. Miller <davem@davemloft.net> | 2010-06-26 10:27:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-26 10:27:00 -0700 |
| commit | c67dda14389205f0a223c5089307495290939b3b (patch) | |
| tree | fad0bb26b28703d02a22ebdd44d94eabac4a2ade /include/linux/blkdev.h | |
| parent | 43bc2db47292a824152145253b1dd2847e7312a3 (diff) | |
| parent | 7e27d6e778cd87b6f2415515d7127eba53fe5d02 (diff) | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 9 |
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) |