[PATCH 10/14] block: factor out a alloc_io_context helper
From: Christoph Hellwig <hch@lst.de>
Date: 2021-11-26 12:36:21
Also in:
linux-block
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Factor out a helper that just allocate an I/O context. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/blk-ioc.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index cc4eb2ba87f74..b42fbb82d5c0c 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c@@ -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
--
2.30.2