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authorJens Axboe <axboe@fb.com>2016-12-14 22:23:43 +0100
committerJens Axboe <axboe@fb.com>2017-01-17 18:03:42 +0100
commitc23ecb426084a98418ee29124c139e37c274ad04 (patch)
treecc5a01c2a4af28ce0fbd539bb6194812f1cb1510 /block/blk.h
parentblock: move existing elevator ops to union (diff)
downloadlinux-c23ecb426084a98418ee29124c139e37c274ad04.tar.xz
linux-c23ecb426084a98418ee29124c139e37c274ad04.zip
block: move rq_ioc() to blk.h
We want to use it outside of blk-core.c. Signed-off-by: Jens Axboe <axboe@fb.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Omar Sandoval <osandov@fb.com>
Diffstat (limited to '')
-rw-r--r--block/blk.h16
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