Commit a0f14d8b authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: factor out a alloc_io_context helper 



Factor out a helper that just allocate an I/O context.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211126115817.2087431-11-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 50569c24

block/blk-ioc.c

+14 −5
Original line number Diff line number Diff line
@@ -249,18 +249,15 @@ void ioc_clear_queue(struct request_queue *q) 
	__ioc_clear_queue(&icq_list);

}



static int create_task_io_context(struct task_struct *task, gfp_t gfp_flags,

		int node)

static struct io_context *alloc_io_context(gfp_t gfp_flags, int node)

{

	struct io_context *ioc;

	int ret;



	ioc = kmem_cache_alloc_node(iocontext_cachep, gfp_flags | __GFP_ZERO,

				    node);

	if (unlikely(!ioc))

		return -ENOMEM;

		return NULL;



	/* initialize */

	atomic_long_set(&ioc->refcount, 1);

	atomic_set(&ioc->nr_tasks, 1);

	atomic_set(&ioc->active_ref, 1);
@@ -268,6 +265,18 @@ static int create_task_io_context(struct task_struct *task, gfp_t gfp_flags, 
	INIT_RADIX_TREE(&ioc->icq_tree, GFP_ATOMIC);

	INIT_HLIST_HEAD(&ioc->icq_list);

	INIT_WORK(&ioc->release_work, ioc_release_fn);

	return ioc;

}



static int create_task_io_context(struct task_struct *task, gfp_t gfp_flags,

		int node)

{

	struct io_context *ioc;

	int ret;



	ioc = alloc_io_context(gfp_flags, node);

	if (!ioc)

		return -ENOMEM;



	/*

	 * Try to install.  ioc shouldn't be installed if someone else