diff options
Diffstat (limited to 'block/blk.h')
| -rw-r--r-- | block/blk.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h index f46c0ac8ae3d..9a716b5925a4 100644 --- a/block/blk.h +++ b/block/blk.h @@ -264,6 +264,22 @@ void ioc_clear_queue(struct request_queue *q); int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node); /** + * rq_ioc - determine io_context for request allocation + * @bio: request being allocated is for this bio (can be %NULL) + * + * Determine io_context to use for request allocation for @bio. May return + * %NULL if %current->io_context doesn't exist. + */ +static inline struct io_context *rq_ioc(struct bio *bio) +{ +#ifdef CONFIG_BLK_CGROUP + if (bio && bio->bi_ioc) + return bio->bi_ioc; +#endif + return current->io_context; +} + +/** * create_io_context - try to create task->io_context * @gfp_mask: allocation mask * @node: allocation node |