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block: factor out a alloc_io_context helper

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211126115817.2087431-11-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-11-26 12:58:13 +01:00 committed by Jens Axboe
parent 50569c24be
commit a0f14d8baa
1 changed files with 14 additions and 5 deletions
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19
block/blk-ioc.c
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@ -249,18 +249,15 @@ void ioc_clear_queue(struct request_queue *q)
__ioc_clear_queue(&icq_list); __ioc_clear_queue(&icq_list);
} }
static int create_task_io_context(struct task_struct *task, gfp_t gfp_flags, static struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
int node)
{ {
struct io_context *ioc; struct io_context *ioc;
int ret;
ioc = kmem_cache_alloc_node(iocontext_cachep, gfp_flags | __GFP_ZERO, ioc = kmem_cache_alloc_node(iocontext_cachep, gfp_flags | __GFP_ZERO,
node); node);
if (unlikely(!ioc)) if (unlikely(!ioc))
return -ENOMEM; return NULL;
/* initialize */
atomic_long_set(&ioc->refcount, 1); atomic_long_set(&ioc->refcount, 1);
atomic_set(&ioc->nr_tasks, 1); atomic_set(&ioc->nr_tasks, 1);
atomic_set(&ioc->active_ref, 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_RADIX_TREE(&ioc->icq_tree, GFP_ATOMIC);
INIT_HLIST_HEAD(&ioc->icq_list); INIT_HLIST_HEAD(&ioc->icq_list);
INIT_WORK(&ioc->release_work, ioc_release_fn); 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 * Try to install. ioc shouldn't be installed if someone else