From c23ecb426084a98418ee29124c139e37c274ad04 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 14 Dec 2016 14:23:43 -0700 Subject: block: move rq_ioc() to blk.h We want to use it outside of blk-core.c. Signed-off-by: Jens Axboe Reviewed-by: Johannes Thumshirn Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Reviewed-by: Omar Sandoval --- block/blk.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'block/blk.h') diff --git a/block/blk.h b/block/blk.h index f46c0ac8ae3d..9a716b5925a4 100644 --- a/block/blk.h +++ b/block/blk.h @@ -263,6 +263,22 @@ 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 -- cgit v1.2.3